Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839559 | Radiant energy incandescent lamp | Rolf S. Bergman, John M. Davenport, Richard L. Hansler, Robert G. Hantman, Leonard E. Hoegler | 1989-06-13 |
| 4810932 | Tungsten-halogen incandescent and metal vapor discharge lamps and processes of making such | John M. Davenport, Richard L. Hansler, John J. Karikas | 1989-03-07 |