Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4937433 | Electrical heating unit for sealing vacuum electron tubes | John R. Hale, Earl R. Stahl, Jack H. Davis | 1990-06-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4937433 | Electrical heating unit for sealing vacuum electron tubes | John R. Hale, Earl R. Stahl, Jack H. Davis | 1990-06-26 |