Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864180 | Metal-halide arc tube and lamp having improved uniformity of azimuthal luminous intensity | George J. English, Harold L. Rothwell, Jr. | 1989-09-05 |
| 4823050 | Metal-halide arc tube and lamp having improved uniformity of azimuthal luminous intensity | George J. English, Harold J. Rothwell, Jr. | 1989-04-18 |