Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5001397 | High-pressure gas discharge lamp having electrodes with coil layers having interlocking turns | — | 1991-03-19 |
| 4952841 | High-pressure discharge lamp with improved electrodes | Abraham Coomans, Friedrich J. de Haan, administrator | 1990-08-28 |
| 4847534 | High-pressure discharge lamp with torsionally wound electrode structure | by Friedrich J. de Haan, administrator | 1989-07-11 |