Issued Patents 1989
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890039 | Fluorescent lamp resonant ballast | — | 1989-12-26 |
| 4888526 | Operating system for sun tanning apparatus | — | 1989-12-19 |
| 4888525 | Sun tanning apparatus having electronic operating system | — | 1989-12-19 |
| 4887201 | Self-oscillating inverter with adjustable frequency | — | 1989-12-12 |
| 4885506 | Electronic magnetron power supply | — | 1989-12-05 |
| 4882663 | MOSFET flyback converter | — | 1989-11-21 |
| 4874989 | Electronic ballast unit with integral light sensor and circuit | — | 1989-10-17 |
| 4866757 | Combined telephone and power distribution system | — | 1989-09-12 |
| 4862040 | Frequency-modulated inverter-type ballast | — | 1989-08-29 |
| 4857806 | Self-ballasted screw-in fluorescent lamp | — | 1989-08-15 |
| 4855860 | Ground-fault protected ballast | — | 1989-08-08 |
| 4851739 | Controlled-frequency series-resonant ballast | — | 1989-07-25 |
| RE32953 | Electronic fluorescent lamp ballast with overload protection | — | 1989-06-13 |
| 4835915 | Indirect office lighting system | — | 1989-06-06 |
| 4835413 | Electronic wall switch actuator | — | 1989-05-30 |
| RE32901 | Series-resonant electronic ballast circuit | — | 1989-04-04 |
| 4819146 | Resonant inverter having frequency control | — | 1989-04-04 |