Patent US 4030838A
| Patent number | US 4030838A (click link for details and documents via Google Patents) |
|---|---|
| Title | Photometer mode indicator |
| Inventors | Jon Leroy Fessler |
| Company | Tektronix Inc |
| Filing date | 1976-03-01 |
| Grant date | 1977-06-21 |
| Patent number | US 4030838A (click link for details and documents via Google Patents) |
|---|---|
| Title | Photometer mode indicator |
| Inventors | Jon Leroy Fessler |
| Company | Tektronix Inc |
| Filing date | 1976-03-01 |
| Grant date | 1977-06-21 |