Patent US 4034291A
Patent number | US 4034291A (click link for details and documents via Google Patents) |
---|---|
Title | Electronic measuring instrument combining an oscilloscope and a digital multimeter |
Inventors | David William Allen, Marshall Bond Borchert |
Company | Tektronix Inc |
Filing date | 1975-04-14 |
Grant date | 1977-07-05 |