Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868496 | Variable color comparison oscilloscope | — | 1989-09-19 |
| 4845745 | Display telephone with transducer | — | 1989-07-04 |
| 4845481 | Continuously variable color display device | — | 1989-07-04 |
| 4831326 | Digital voltmeter with variable color background | — | 1989-05-16 |
| 4824269 | Variable color display typewriter | — | 1989-04-25 |
| 4812744 | Variable color analog voltmeter | — | 1989-03-14 |
| 4810937 | Multicolor optical device | — | 1989-03-07 |
| 4804890 | Variable color complementary display device | — | 1989-02-14 |
| 4797651 | Multicolor comparator of digital signals | — | 1989-01-10 |