Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4591752 | Incandescent lamp with high pressure rare gas filled tungsten-halogen element and transparent thick walled safety envelope | Rudolph Kaufman, Harry Kee | 1986-05-27 |
| 4461973 | Energy-efficient incandescent lamp with improved filament characteristics | Rudolph Kaufman | 1984-07-24 |