| 7352158 |
SEPIC synchronous rectification |
— |
2008-04-01 |
| 5789870 |
Low noise inverter for EL lamp |
— |
1998-08-04 |
| 5440616 |
Method and apparatus for interconnecting a messaging system and a private branch exchange |
Daniel A. Harrington, Maura Higgins, Ivan M. Lee, Kenneth E. Waln |
1995-08-08 |
| 5249186 |
Apparatus for detecting the start of frame in bipolar transmission systems |
— |
1993-09-28 |
| 5239453 |
DC to DC converter employing a free-running single stage blocking oscillator |
— |
1993-08-24 |
| 5222102 |
Digital phased locked loop apparatus for bipolar transmission systems |
— |
1993-06-22 |
| 5144287 |
Current level sensing circuit for use with gyrator circuitry |
— |
1992-09-01 |
| 5113186 |
Apparatus for converting an alternate mark inversion signal to unipolar signals with frequency dependent amplification |
— |
1992-05-12 |
| 5097143 |
Bipolar to unipolar converter with automatic gain control |
— |
1992-03-17 |
| 5070439 |
DC to DC converter apparatus employing push-pull oscillators |
— |
1991-12-03 |