Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4647821 | Compact mercury-free fluorescent lamp | Walter P. Lapatovich, Joseph M. Proud | 1987-03-03 |
| 4636692 | Mercury-free discharge lamp | Walter P. Lapatovich | 1987-01-13 |
| 4492898 | Mercury-free discharge lamp | Walter P. Lapatovich | 1985-01-08 |
| 4480213 | Compact mercury-free fluorescent lamp | Walter P. Lapatovich, Joseph M. Proud | 1984-10-30 |