Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4401914 | Low-pressure sodium vapor discharge lamp | Gustaaf A. Wesselink, Hendrik Roelofs | 1983-08-30 |
| 4260931 | Low-pressure mercury vapor discharge lamp with luminescent coatings on envelope walls | Gustaaf A. Wesselink, Hendrik Roelofs | 1981-04-07 |
| 4237400 | Low-pressure discharge lamp with tortuous discharge path | Gustaaf A. Wesselink, Hendrik Roelofs | 1980-12-02 |