Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4664247 | Conveyor brake control | Joachim Wolf, Charles W. Maiden, Andrew P. Kruper | 1987-05-12 |
| 4639851 | Method and apparatus for firing angle control of series connected thyristor switches | — | 1987-01-27 |
| 4575664 | Tachometer check apparatus | — | 1986-03-11 |
| 4325115 | Regulated DC power supply | — | 1982-04-13 |
| 4286315 | Converter apparatus | — | 1981-08-25 |
| 4277825 | Converter apparatus | — | 1981-07-07 |
| 4258829 | Elevator system | — | 1981-03-31 |