Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5476682 | Antifogging plastic lens material | — | 1995-12-19 |
| 5324573 | Antifogging plastic lens material | — | 1994-06-28 |
| 5178797 | Conductive polymer compositions having improved properties under electrical stress | — | 1993-01-12 |
| 5049850 | Electrically conductive device having improved properties under electrical stress | — | 1991-09-17 |
| 4426999 | Solar energy collector | Jeffrey J. Hatman, William E. Clark | 1984-01-24 |
| 4352083 | Circuit protection devices | Lee M. Middleman, Arthur Edward Blake, Victor A. Scheff | 1982-09-28 |
| 4329726 | Circuit protection devices comprising PTC elements | Lee M. Middleman, Donald F. Pettengill | 1982-05-11 |
| 4317027 | Circuit protection devices | Lee M. Middleman | 1982-02-23 |
| 4238812 | Circuit protection devices comprising PTC elements | Lee M. Middleman, Donald F. Pettengill | 1980-12-09 |