Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5456868 | Phenolic resin and carbon products | Stephen Robert Tennison | 1995-10-10 | $22,660,000 |
| 4917835 | Process for the production of porous shaped articles | Stephen Robert Tennison, Paul W. Satchell | 1990-04-17 | $12,625,000 |
| 4673844 | Starter circuit for a fluorescent tube lamp | Michael J. Maytum | 1987-06-16 | $4,106,000 |
| 4629944 | Starter circuit for a fluorescent tube lamp | Michael J. Maytum, Stephen W. Byatt, Richard Rodrigues | 1986-12-16 | $1,763,000 |
| 4370567 | Semiconductor switch device suitable for A.C. power control | — | 1983-01-25 | $5,901,000 |