Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4797302 | Electric lamp having a mirror-coated lamp vessel | Johannes W. Ingeveld | 1989-01-10 |
| 4758761 | Electric lamp vessel having a mirror coating with a sharply defined boundary | Johannes W. Ingeveld | 1988-07-19 |