Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5844350 | Coated arc tube for sodium vapor lamp | Curtis E. Scott | 1998-12-01 |
| 4690727 | Glaze polishing polycrystalline alumina material | Curtis E. Scott | 1987-09-01 |
| 4633137 | Glaze polished polycrystalline alumina material | Curtis E. Scott | 1986-12-30 |
| 4567396 | Increased efficacy high pressure sodium lamp yielded by increased wall temperature operation | — | 1986-01-28 |
| 4559473 | Electrode structure for high pressure sodium vapor lamps | — | 1985-12-17 |
| 4464603 | Ceramic seal for high pressure sodium vapor lamps | — | 1984-08-07 |
| 4459513 | High pressure sodium vapor lamp having resistance heater means | Robert G. Frey | 1984-07-10 |
| 4442378 | High pressure sodium vapor lamp having resistance heater means | Robert G. Frey | 1984-04-10 |
| 4442379 | High pressure sodium vapor lamp having resistance heater means | Robert G. Frey | 1984-04-10 |
| 4342939 | Universal burning ceramic lamp | — | 1982-08-03 |
| 4208605 | Alumina, calcia, baria sealing composition optionally modified with B.sub.2 .sub.3 | Ranajit K. Datta | 1980-06-17 |