Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6169762 | Interface devices providing electrical isolation | Jonathan H. Fischer, Donald R. Laturell, Robert F. Lee | 2001-01-02 |
| 6013934 | Semiconductor structure for thermal shutdown protection | Muhammed Ayman Shibib | 2000-01-11 |
| 5929708 | Low-voltage radio frequency amplifier | Paul C. Davis, Brian K. Horton | 1999-07-27 |
| 5903190 | Amplifier feedforward arrangement and method for enhanced frequency response | Robert F. Lee | 1999-05-11 |
| 5838187 | Integrated circuit thermal shutdown system utilizing a thermal sensor | — | 1998-11-17 |
| 5744987 | Signal converter for reproducing audio signals recorded on a film medium | Paul M. Embree | 1998-04-28 |
| 5689211 | Quiescent current control for the output stage of an amplifier | — | 1997-11-18 |
| 5684432 | Amplifier output stage having enhanced drive capability | — | 1997-11-04 |
| 5389892 | Input stages for high voltage operational amplifier | — | 1995-02-14 |
| 5187637 | Monolithic high-voltage capacitor | — | 1993-02-16 |
| 4720643 | Peak catcher circuit | Robert F. Lee | 1988-01-19 |
| 4631362 | Low resistance origination scan circuit | Tom D. Arntsen, Joseph H. Havens, Rouben Toumani | 1986-12-23 |
| 4588940 | Temperature compensated semiconductor integrated circuit | Elizabeth Ellen Perry | 1986-05-13 |
| 4492824 | Speakerphone linear comparator | Steve Bell | 1985-01-08 |
| 4479066 | AC/DC Current divider circuit | — | 1984-10-23 |
| 4473719 | Switchhook status detector | Dieter John Henry Knollman, Earl O. Martin | 1984-09-25 |
| 4419542 | Battery feed circuit | Dieter John Henry Knollman, Earl O. Martin | 1983-12-06 |
| 4412184 | Precision isolation amplifier | — | 1983-10-25 |
| 4354122 | Voltage to current converter | William G. Garrett | 1982-10-12 |
| 4330744 | Precision converter/isolation circuit | Earl O. Martin | 1982-05-18 |
| 4323797 | Reciprocal current circuit | William G. Garrett | 1982-04-06 |
| 4292604 | Relaxation oscillator with plural constant current sources | David C. Goldthorp, David R. Vogelpohl | 1981-09-29 |
| 4276448 | Electronic tone ringer | David C. Goldthorp, David R. Vogelpohl | 1981-06-30 |