Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5982089 | Low-pressure mercury discharge meander lamp dimensioned for even illumination and favorable power consumption | Franciscus A. S. Ligthart | 1999-11-09 |
| 4571526 | Low-pressure discharge lamp with cooled internal ballast | — | 1986-02-18 |
| 4455508 | Low-pressure mercury vapor discharge lamp | — | 1984-06-19 |
| 4401914 | Low-pressure sodium vapor discharge lamp | Hendrik Roelofs, Cornelis H. M. Van Bommel | 1983-08-30 |
| 4260931 | Low-pressure mercury vapor discharge lamp with luminescent coatings on envelope walls | Hendrik Roelofs, Cornelis H. M. Van Bommel | 1981-04-07 |
| 4237400 | Low-pressure discharge lamp with tortuous discharge path | Hendrik Roelofs, Cornelis H. M. Van Bommel | 1980-12-02 |
| 4213100 | Gas discharge laser | Robertus A. J. Keijser, Bram J. Derksema, Johannes A. T. Verhoeven | 1980-07-15 |
| 4181155 | Pressure energy accumulator | Adrianus J. J. Franken, Hendricus F. G. Smulders | 1980-01-01 |