Category:Patents
| Page | Office | Number | Title | Inventors | Company | Filing date | Grant date |
|---|---|---|---|---|---|---|---|
| Patent AU 1028470A | AU | 1028470A | Multistable circuit including elements preset for conduction | Hiro Moriyasu | Tektronix Inc | 1969-01-21 | 1970-01-14 |
| Patent AU 2001238550 | AU | 2001238550 | Membrane probing system | Gene Cowan • Mike P. Dauphinais • Martin J. Koxxy • Kenneth R. Smith • Paul A. Tervo | Cascade Microtech, Inc. | 2000-02-25 | 2001-02-20 |
| Patent AU 438245 | AU | 438245 | Multistable circuit including elements preset for conduction | Hiro Moriyasu | Tektronix Inc | 1969-01-21 | 1970-01-14 |
| Patent CA 1018684A | CA | 1018684A | Oscilloscope sampling system | Luis Navarro • Wim Velsink • Jack Gilmore • Hiro Moriyasu | Luis Navarro, Wim Velsink, Tektronix, Jack Gilmore, Hiro Moriyasu | 1973-01-08 | 1976-06-04 |
| Patent CA 1032281A | CA | 1032281A | Oscilloscope system for acquiring, processing, and displaying information | Luis Navarro • Hiro Moriyasu • Wim Velsink • Jack Gilmore | Tektronix | 1973-01-08 | 1974-01-07 |
| Patent CA 1038440A | CA | 1038440A | Dual-beam crt | Conrad Odenthal | Tektronix Inc | 1977-09-22 | 1978-09-12 |
| Patent CA 1044745A | CA | 1044745A | Dual beam crt | Conrad Odenthal | Tektronix Inc | 1975-06-06 | 1978-12-19 |
| Patent CA 1112283A | CA | 1112283A | Quadrupole lens having interdigitated lobes on adjacent tubular members | Bozidar Janko | Tektronix Inc | 1980-07-31 | 1981-11-10 |
| Patent CA 1149003A | CA | 1149003A | Electron gun having a low capacitance cathode and grid assembly | Conrad Odenthal | Tektronix Inc | 1980-01-31 | 1983-06-28 |
| Patent CA 793994A | CA | 793994A | Automatic time base rate circuit | Hiro Moriyasu | Tektronix Inc | 1968-09-03 | |
| Patent CA 798503A | CA | 798503A | Trigger level control circuit | Hiro Moriyasu | Tektronix Inc | 1968-11-05 | |
| Patent CA 907199A | CA | 907199A | Read only memory employing striplines | Hiro Moriyasu | Tektronix Inc | 1972-08-08 | |
| Patent CA 910988A | CA | 910988A | Transmission line circuit having common delay line for two signal paths of opposite direction | Hiro Moriyasu | Tektronix Inc | 1972-09-26 | |
| Patent EP 0110614 | EP | 0110614 | Current-limiting mechanism for a precision differential amplifier | Art Metz • Ken Schlotzhauer | Tektronix Inc | 1983-11-15 | 1987-01-14 |
| Patent EP 0114731B1 | EP | 0114731B1 | Differential amplifier with high common-mode rejection | Wink Gross | Tektronix Inc | 1984-01-12 | 1986-09-10 |
| Patent EP 0163443B1 | EP | 0163443B1 | Cathode ray tube astigmatism correction apparatus | Conrad Odenthal | Tektronix Inc | 1985-05-09 | 1990-08-16 |
| Patent EP 0206518A3 | EP | 0206518A3 | Vertical raster scan controller | John D. Bowne • Les Larson | Tektronix Inc | 1986-05-21 | 1986-12-30 |
| Patent EP 0238747B1 | EP | 0238747B1 | Low jitter digital delay generator | George J. Caspell • Agoston Agoston | Tektronix Inc | 1986-10-20 | 1991-12-04 |
| Patent EP 0239696B1 | EP | 0239696B1 | Linearity correcting control circuit for tunable delay line | Laszlo J. Dobos • Agoston Agoston | Tektronix Inc | 1986-10-16 | 1993-11-24 |
| Patent EP 0244248B1 | EP | 0244248B1 | Electro-optic sampler | Agoston Agoston • Cornelis Teunis Veenendaal | Tektronix Inc | 1987-04-30 | 1995-01-11 |
| Patent EP 0244826A2 | EP | 0244826A2 | Multiple beam electron discharge tube having beam convergence and beam-to-beam compression compensation | Conrad Odenthal | Tektronix Inc | 1987-05-05 | 1987-11-11 |
| Patent EP 0248962B1 | EP | 0248962B1 | Comb generators | Agoston Agoston • Stan Kaveckis | Tektronix Inc | 1986-11-05 | 1993-05-12 |
| Patent EP 0415562B1 | EP | 0415562B1 | Grid assemblies for use in cathode ray tube | Conrad Odenthal | Tektronix Inc | 1990-07-30 | 1995-11-02 |
| Patent EP 0462626B1 | EP | 0462626B1 | Travelling wave sampler | Agoston Agoston | Tektronix Inc | 1986-10-20 | 1993-08-11 |
| Patent EP 0938239A1 | EP | 0938239A1 | Low duty-cycle transport of video reference images | Bozidar Janko | Tektronix Inc | 1999-01-27 | 2002-07-10 |
| Patent EP 1107604A2 | EP | 1107604A2 | Detection of repeated and frozen frames in a video signal | Bozidar Janko • Kamalesh Patel | Tektronix Inc | 2000-11-28 | 2005-03-16 |
| Patent EP 1570279 | EP | 1570279 | Guarded tub enclosure | John Dunklee • Greg Nordgren • Gene Cowan | Cascade Microtech, Inc. | 2002-12-13 | 2003-10-27 |
| Patent EP0574918A1 | EP | 0574918A1 | Selectable AC or DC coupling for coaxial transmission lines | Robert J. Lewandowski • Daniel G. Dow • Fred Telewski | Fluke Corp | 1993-06-17 | 1993-12-22 |
| Patent GB 460562A | GB | 460562A | Improvements In and Relating to Thermionic Valve Circuits | W.S.Percival | 1935-07-24 | 1937-01-25 | |
| Patent US 2004143201 | US | 2004143201 | Method of supporting and fastening for effective energy transfer utilizing a vibrating motor for a floor mat application | Hiro Moriyasu | Hiro Moriyasu | 2003-01-17 | 2003-01-17 |
| Patent US 2008170726A1 | US | 20080170726A1 | Intelligent solo-mute switching | Richard Cabot | Richard Cabot | 2007-01-11 | 2008-07-17 |
| Patent US 2009125269 | US | 2009125269 | Channel reconfigurable logic analyzer | Ronald Arthur Acuff • Les Larson • Kevin E. Gosgrove | Tektronix Inc | 2008-10-15 | |
| Patent US 2011074389 | US | 2011074389 | Signal Acquisition System Having Probe Cable Termination in a Signal Processing Instrument | Dan Knierim • Josiah A. Bartlett • Ira G. Pollock • Les Larson | Tektronix Inc | 2010-07-29 | |
| Patent US 2011074391 | US | 2011074391 | Signal Acquisition System Having a Compensation Digital Filter | Josiah A. Bartlett • Ira G. Pollock • Dan Knierim • Les Larson • Scott R. Jansen • Kenneth P. Dobyns • Michael Duane Stevens | Tektronix Inc | 2010-07-29 | |
| Patent US 2011074392 | US | 2011074392 | Signal Acquisition System Having Reduced Probe Loading of a Device Under Test | Josiah A. Bartlett • Ira G. Pollock • Dan Knierim • Les Larson • Scott R. Jansen • Kenneth P. Dobyns • Michael Duane Stevens | Tektronix Inc | 2010-07-29 | |
| Patent US 2011074441 | US | 2011074441 | Low Capacitance Signal Acquisition System | Josiah A. Bartlett • Ira G. Pollock • Dan Knierim • Les Larson • Scott R. Jansen • Kenneth P. Dobyns • Michael Duane Stevens | Tektronix Inc | 2009-09-30 | |
| Patent US 2012299579 | US | 2012299579 | Test and measurement instrument including asynchronous time-interleaved digitizer using harmonic mixing | Dan Knierim | Tektronix Inc | 2011-05-26 | |
| Patent US 2013022133 | US | 2013022133 | Wideband Balun Structure | Dan Knierim • James S. Lamb • Josiah A. Bartlett | Tektronix Inc | 2011-12-31 | |
| Patent US 2014002292 | US | 2014002292 | Almost real-time sampling for ground-penetrating radar impulses | Dan Knierim | Tektronix Inc | 2012-06-28 | |
| Patent US 2014103951 | US | 2014103951 | Automatic probe ground connection checking techniques | Dan Knierim • William A. Hagerup • Barton T. Hickman • Ira G. Pollock | Tektronix Inc | 2012-10-11 | |
| Patent US 2280524A | US | 2280524A | Electrical wave analysis | Siegfried Hansen | General Electric | 1940-11-01 | 1942-04-21 |
| Patent US 2280531A | US | 2280531A | Oscillograph apparatus | Donald E Norgaard | General Electric | 1940-11-01 | 1942-04-21 |
| Patent US 2540012A | US | 2540012A | Electrical connector | Octavio M. Salati | Hazeltine Research, Inc. | 1945-05-19 | 1951-01-30 |
| Patent US 2548457A | US | 2548457A | Coaxial connector for high-frequency transmission lines | Harold M Wilson | General Radio | 1947-01-10 | 1951-04-10 |
| Patent US 2577506A | US | 2577506A | Amplifier | Logan Belleville | Logan Belleville | 1945-07-09 | 1951-12-04 |
| Patent US 2752527A | US | 2752527A | Method of magnifying waveforms on a cathode-ray tube and circuit therefor | Dick Ropiequet • Cliff Moulton | Tektronix Inc | 1953-08-18 | 1956-06-26 |
| Patent US 2756394 | US | 2756394 | Delay cables | Josef Sieven, Hannoyer-Keefeld, and Ernst Scheffler | Hackethal Draht-und Kabel Werke | 1953-07-14 | 1956-07-24 |
| Patent US 2769904A | US | 2769904A | Gated sweep generator | Dick Ropiequet | Tektronix Inc | 1953-08-18 | 1956-11-06 |
| Patent US 2769905A | US | 2769905A | Sweep circuit | Dick Ropiequet | Tektronix Inc | 1953-08-18 | 1956-11-06 |
| Patent US 2778935A | US | 2778935A | Cascode multivibrator | Dick Ropiequet | Tektronix Inc | 1953-08-18 | 1957-01-22 |
| Patent US 2791642A | US | 2791642A | Phase inversion circuit | John Kobbe | Tektronix Inc | 1953-07-06 | 1957-05-07 |
| Patent US 2804571A | US | 2804571A | Unblanking circuit for cathode ray tubes | John Kobbe | Tektronix Inc | 1953-04-20 | 1957-08-27 |
| Patent US 2826694A | US | 2826694A | Free-running multivibrator | Dick Ropiequet | Tektronix Inc | 1955-03-10 | 1958-03-11 |
| Patent US 2836807A | US | 2836807A | Ceramic terminal mount | Ted Goodfellow • Robert J Davis | Tektronix Inc | 1953-04-20 | 1958-05-27 |
| Patent US 2853609A | US | 2853609A | Multivibrator hold off circuit | Dick Ropiequet • John Kobbe | Tektronix Inc | 1955-02-21 | 1958-09-23 |
| Patent US 2854640 | US | 2854640 | Electromagnetic delay cable | Henry G. Nordlin | International Telephone and Telegraph Corporation | 1954-05-11 | 1958-09-30 |
| Patent US 2883619A | US | 2883619A | Electrical probe | John Kobbe • Bill Polits | Tektronix Inc | 1956-02-29 | 1959-04-21 |
| Patent US 2922074A | US | 2922074A | Electron beam deflection structure | Cliff Moulton | Tektronix Inc | 1956-09-17 | 1960-01-19 |
| Patent US 2924712A | US | 2924712A | Sweep voltage generator | George Edens | Tektronix Inc | 1957-09-23 | 1960-02-09 |
| Patent US 2930986A | US | 2930986A | Distributed amplifier | John Kobbe • Bill Polits | Tektronix Inc | 1956-02-29 | 1960-03-29 |
| Patent US 3009094A | US | 3009094A | Current control circuit | Charlie Rhodes | Tektronix Inc | 1959-04-20 | 1961-11-14 |
| Patent US 3011129A | US | 3011129A | Plural series gate sampling circuit using positive feedback | K. B. Magleby • V. E. Van Duzer | Hewlett-Packard | 1959-08-10 | 1961-11-28 |
| Patent US 3022973A | US | 3022973A | Support device | Jim Morrow • Jamie N Boyle | Tektronix Inc | 1958-07-22 | 1962-02-27 |
| Patent US 3023336A | US | 3023336A | Cathode ray tube having post acceleration | Lothar Frenkel | Tektronix Inc | 1957-10-25 | 1962-02-27 |
| Patent US 3061788A | US | 3061788A | Multivibrator hold-off circuit | John Kobbe | Tektronix Inc | 1958-09-17 | 1962-10-30 |
| Patent US 3071737A | US | 3071737A | Signal energy take off device | Tat Cheong Lam | Tektronix Inc | 1961-06-26 | 1963-01-01 |
| Patent US 3074011A | US | 3074011A | Turret device for electric circuits | Langdon C Hedrick | Tektronix Inc | 1958-10-20 | 1963-01-15 |
| Patent US 3074020A | US | 3074020A | Bistable multivibrator which changes states in response to a single limited range, variable input signal | Dick Ropiequet | Tektronix Inc | 1959-11-24 | 1963-01-15 |
| Patent US 3105945A | US | 3105945A | Signal energy take off device | Sam McCutcheon • Norm Winningstad • Cliff Moulton | Tektronix Inc | 1960-11-07 | 1963-10-01 |
| Patent US 3121020A | US | 3121020A | Coating method and apparatus for notches and other surface discontinuities | Robert Low | Tektronix Inc | 1960-05-31 | 1964-02-11 |
| Patent US 3122652A | US | 3122652A | Time base generator | John Kobbe • Oz Svehaug | Tektronix Inc | 1960-12-21 | 1964-02-25 |
| Patent US 3134077A | US | 3134077A | Electrical probe apparatus for measuring the characteristics of semiconductor material | Thomas B Hutchins IV • William C Myers • Jean F DeLord | Tektronix Inc | 1961-09-18 | 1964-05-19 |
| Patent US 3138764A | US | 3138764A | Ramp generator employing comparator circuit for maintaining constant starting voltages for different timing resistors | Oliver Dalton • Bob Rullman | Tektronix Inc | 1962-07-09 | 1964-06-23 |
| Patent US 3149903A | US | 3149903A | Optical apparatus | Maury Merrick | Tektronix Inc | 1960-12-29 | 1964-09-22 |
| Patent US 3150247A | US | 3150247A | Coaxial connector and switch combination | Bob White | Tektronix Inc | 1962-04-26 | 1964-09-22 |
| Patent US 3153581A | US | 3153581A | Large area connection for semiconductors and method of making | Thomas B Hutchins IV | Tektronix Inc | 1960-11-21 | 1964-10-20 |
| Patent US 3153734A | US | 3153734A | Comparator circuits for determining when a number is greater than a predetermined number | Sam McCutcheon | Tektronix Inc | 1962-06-18 | 1964-10-20 |
| Patent US 3159780A | US | 3159780A | Semiconductor bridge rectifier | Paul F Parks | Tektronix Inc | 1961-06-19 | 1964-12-01 |
| Patent US 3168656A | US | 3168656A | Transmission line circuit having termination impedance which includes emitter junction of transistor | John Kobbe | Tektronix Inc | 1962-06-18 | 1965-02-02 |
| Patent US 3168679A | US | 3168679A | Intensity control compensation circuit for use in a cathode ray oscilloscope | John Kobbe | Tektronix Inc | 1961-05-08 | 1965-02-02 |
| Patent US 3174070A | US | 3174070A | Electron beam deflection structure with compensation for beam transit time | Cliff Moulton | Tektronix Inc | 1961-08-14 | 1965-03-16 |
| Patent US 3181086A | US | 3181086A | Electrical switch with the outer conductors of coaxial leads connected to spaced shield plates | Sam McCutcheon • Norm Winningstad | Tektronix Inc | 1961-06-12 | 1965-04-27 |
| Patent US 3185887A | US | 3185887A | Deflection amplifier compensation linearizer circuit | John Kobbe | Tektronix Inc | 1961-03-20 | 1965-05-25 |
| Patent US 3187118A | US | 3187118A | Electrical switch having means for interconnecting concentric switch shafts | Marlow Butler • Oz Svehaug | Tektronix Inc | 1962-01-18 | 1965-06-01 |
| Patent US 3188244A | US | 3188244A | Method of forming pn junction in semiconductor material | Thomas B Hutchins IV • Jean F DeLord • William C Myers | Tektronix Inc | 1961-04-24 | 1965-06-08 |
| Patent US 3188264A | US | 3188264A | Loose fill packing material | Robert E Holden | Tektronix Inc | 1962-12-21 | 1965-06-08 |
| Patent US 3196292A | US | 3196292A | Noise suppressor circuit | Sam McCutcheon | Tektronix Inc | 1964-02-26 | 1965-07-20 |
| Patent US 3207861A | US | 3207861A | Dual switch assembly including two switches operated independently by a common driveshaft | Bob White | Tektronix Inc | 1963-06-20 | 1965-09-21 |
| Patent US 3207936A | US | 3207936A | Electron beam display device | William H Wilbanks • Robert H Johnson • Chan H Wang • Frank C Erzen | Tektronix Inc | 1961-08-21 | 1965-09-21 |
| Patent US 3214516A | US | 3214516A | Storage tube and electrical readout apparatus and method for such tube | Bob Anderson | Tektronix Inc | 1962-12-19 | 1965-10-26 |
| Patent US 3214607A | US | 3214607A | Pulse generator circuit | John V Rogers | Tektronix Inc | 1961-08-15 | 1965-10-26 |
| Patent US 3214631A | US | 3214631A | Tube having target with store and/or non-store sections | Bob Anderson | Tektronix Inc | 1962-08-06 | 1965-10-26 |
| Patent US 3215948A | US | 3215948A | Triggering circuit for automatically changing the mode of operation of a signal generator | Oliver Dalton | Tektronix Inc | 1962-03-23 | 1965-11-02 |
| Patent US 3215959A | US | 3215959A | Shielded electrical attenuator assembly | Wim Velsink | Tektronix Inc | 1963-08-19 | 1965-11-02 |
| Patent US 3219801A | US | 3219801A | Pulse counter | John Kobbe • Sam McCutcheon | Tektronix Inc | 1961-08-25 | 1965-11-23 |
| Patent US 3227992A | US | 3227992A | Mounting device for transistor socket and other components | William W Strong | Tektronix Inc | 1963-10-21 | 1966-01-04 |
| Patent US 3229106A | US | 3229106A | Method of modulating light with intrinsic semiconductor device and electrical signal modulator employing such device | Jean F DeLord • William C Myers • Kent H Johnston | Tektronix Inc | 1961-10-16 | 1966-01-11 |
| Patent US 3229212A | US | 3229212A | Direct sampling apparatus | John V Rogers | Tektronix Inc | 1963-02-18 | 1966-01-11 |
| Patent US 3247462A | US | 3247462A | Balanced paraphase amplifier including a feed forward path | John Kobbe | Tektronix Inc | 1963-08-19 | 1966-04-19 |
| Patent US 3248655A | US | 3248655A | Ratchet memory circuit and sampling system employing such circuit | John Kobbe • Cliff Moulton • John V Rogers • Norm Winningstad | Tektronix Inc | 1962-05-07 | 1966-04-26 |
Pages in category "Patents"
The following 200 pages are in this category, out of 2,117 total.
(previous page) (next page)P
- Patent AU 1028470A
- Patent AU 2001238550
- Patent AU 438245
- Patent CA 1018684A
- Patent CA 1032281A
- Patent CA 1038440A
- Patent CA 1044745A
- Patent CA 1112283A
- Patent CA 1149003A
- Patent CA 793994A
- Patent CA 798503A
- Patent CA 907199A
- Patent CA 910988A
- Patent EP 0110614
- Patent EP 0114731B1
- Patent EP 0163443B1
- Patent EP 0206518A3
- Patent EP 0238747B1
- Patent EP 0239696B1
- Patent EP 0244248B1
- Patent EP 0244826A2
- Patent EP 0248962B1
- Patent EP 0415562B1
- Patent EP 0462626B1
- Patent EP 0938239A1
- Patent EP 1107604A2
- Patent EP 1570279
- Patent EP0574918A1
- Patent GB 460562A
- Patent US 2004143201
- Patent US 2008170726A1
- Patent US 2009125269
- Patent US 2011074389
- Patent US 2011074391
- Patent US 2011074392
- Patent US 2011074441
- Patent US 2012299579
- Patent US 2013022133
- Patent US 2014002292
- Patent US 2014103951
- Patent US 2280524A
- Patent US 2280531A
- Patent US 2540012A
- Patent US 2548457A
- Patent US 2577506A
- Patent US 2752527A
- Patent US 2756394
- Patent US 2769904A
- Patent US 2769905A
- Patent US 2778935A
- Patent US 2791642A
- Patent US 2804571A
- Patent US 2826694A
- Patent US 2836807A
- Patent US 2853609A
- Patent US 2854640
- Patent US 2883619A
- Patent US 2922074A
- Patent US 2924712A
- Patent US 2930986A
- Patent US 3009094A
- Patent US 3011129A
- Patent US 3022973A
- Patent US 3023336A
- Patent US 3061788A
- Patent US 3071737A
- Patent US 3074011A
- Patent US 3074020A
- Patent US 3105945A
- Patent US 3121020A
- Patent US 3122652A
- Patent US 3134077A
- Patent US 3138764A
- Patent US 3149903A
- Patent US 3150247A
- Patent US 3153581A
- Patent US 3153734A
- Patent US 3159780A
- Patent US 3168656A
- Patent US 3168679A
- Patent US 3174070A
- Patent US 3181086A
- Patent US 3185887A
- Patent US 3187118A
- Patent US 3188244A
- Patent US 3188264A
- Patent US 3196292A
- Patent US 3207861A
- Patent US 3207936A
- Patent US 3214516A
- Patent US 3214607A
- Patent US 3214631A
- Patent US 3215948A
- Patent US 3215959A
- Patent US 3219801A
- Patent US 3227992A
- Patent US 3229106A
- Patent US 3229212A
- Patent US 3247462A
- Patent US 3248655A
- Patent US 3249866A
- Patent US 3253144A
- Patent US 3253225A
- Patent US 3255393A
- Patent US 3255419A
- Patent US 3256484A
- Patent US 3258765A
- Patent US 3268659A
- Patent US 3274505A
- Patent US 3275878A
- Patent US 3277319A
- Patent US 3281618A
- Patent US 3281702A
- Patent US 3281705A
- Patent US 3281895A
- Patent US 3283248A
- Patent US 3293473A
- Patent US 3293474A
- Patent US 3297885A
- Patent US 3305800A
- Patent US 3308352A
- Patent US 3309532A
- Patent US 3309605A
- Patent US 3312850A
- Patent US 3317743A
- Patent US 3317782A
- Patent US 3317830A
- Patent US 3321712A
- Patent US 3323070A
- Patent US 3325673A
- Patent US 3325742A
- Patent US 3325754A
- Patent US 3337779A
- Patent US 3339088A
- Patent US 3339099A
- Patent US 3344285A
- Patent US 3350576A
- Patent US 3350640A
- Patent US 3355620A
- Patent US 3358155A
- Patent US 3358159A
- Patent US 3359429A
- Patent US 3359491A
- Patent US 3361270A
- Patent US 3363179A
- Patent US 3369173A
- Patent US 3375456A
- Patent US 3375501A
- Patent US 3377116A
- Patent US 3381238A
- Patent US 3389030A
- Patent US 3393857A
- Patent US 3394316A
- Patent US 3397590A
- Patent US 3401293A
- Patent US 3408530A
- Patent US 3408533A
- Patent US 3408580A
- Patent US 3412282A
- Patent US 3413513A
- Patent US 3421041A
- Patent US 3421102A
- Patent US 3422305A
- Patent US 3423685A
- Patent US 3426236A
- Patent US 3426237A
- Patent US 3426238A
- Patent US 3426311A
- Patent US 3430093A
- Patent US 3433994A
- Patent US 3434049A
- Patent US 3439227A
- Patent US 3439282A
- Patent US 3441863A
- Patent US 3446906A
- Patent US 3449619A
- Patent US 3449671A
- Patent US 3453403A
- Patent US 3457505A
- Patent US 3461386A
- Patent US 3470484A
- Patent US 3473044A
- Patent US 3475682A
- Patent US 3479075A
- Patent US 3482163A
- Patent US 3483488A
- Patent US 3487314A
- Patent US 3495451A
- Patent US 3507593A
- Patent US 3510690A
- Patent US 3512427A
- Patent US 3519966A
- Patent US 3524993A
- Patent US 3524998A
- Patent US 3525041A
- Patent US 3529252A
- Patent US 3530315A
- Patent US 3531675A
- Patent US 3532982A
- Patent US 3534155A