Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888517 | Double-enveloped lamp having a shield surrounding a light-source capsule within a thick-walled outer envelope | William M. Keeffe, Joseph S. Kulik, Simone P. Bazin | 1989-12-19 |
| 4859899 | Metal-halide lamp having heat redistribution means | William M. Keeffe, Zeya K. Krasko, James C. Morris | 1989-08-22 |