Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6239540 | Compact low pressure discharge lamp having spring element to connect the supply leads of the lamp to the electric terminals of the mounting plate | — | 2001-05-29 |
| 6011347 | Compact low-pressure discharge lamp utilizing helical or spiral springs to connect the supply leads of the lamp envelope to the electric terminals within the lamp cap | — | 2000-01-04 |
| 5289079 | Compact fluorescent lamp and base combination, and method of lamp-base assembly | — | 1994-02-22 |
| 5006755 | Mercury discharge lamp with mercury containing capsule | Michael Dietrich, Erolf Weinhardt | 1991-04-09 |
| 4738630 | Socket for receiving the base of a single-based fluorescent lamp | — | 1988-04-19 |
| 4695767 | Single-ended fluorescent lamp-base combination | — | 1987-09-22 |
| 4672263 | Single-ended fluorescent discharge lamp construction | Helmut Grahmann | 1987-06-09 |