Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5166575 | Grid tube with coupled-cavity output, with coupling element integral with said tube | — | 1992-11-24 | |
| 5099332 | Grid tube with increased efficiency | Claude Grolleau, Guy Peillex-Delphe | 1992-03-24 | |
| 4644217 | Electron tube with a device for cooling the grid base | Roger Hoet | 1987-02-17 | $8,000 |
| 4639633 | Electron tube with cathode cooling device | Roger Hoet | 1987-01-27 | $8,000 |
| 4571525 | Resonant coaxial cavities for a grid vacuum tube | Claude Grolleau | 1986-02-18 | |
| 4563609 | Directly-heated cathodes | Guy Clerc, Roger Hoet | 1986-01-07 | |
| 4311975 | Frequency band filter | Michel R. Benoit, Claude Grolleau, Alain Lartillot | 1982-01-19 | |
| 4302705 | Capacitive coupling device for an electron tube | Michel R. Benoit | 1981-11-24 | |
| 4245379 | Method of fabrication of flat grids of pyrolitic graphite for electron tubes | Roger Hoet | 1981-01-20 |