Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6229422 | Electrically switchable magnet system | — | 2001-05-08 |
| 6002317 | Electrically switchable magnet system | — | 1999-12-14 |
| 4663602 | Magnetic chuck | — | 1987-05-05 |
| 4633361 | Chuck control for a workpiece holding electromagnet | Roger B. Ela | 1986-12-30 |
| 4370693 | Demagnetizing apparatus for a workpiece holding electromagnet | Donald C. McDonald, Roger B. Ela | 1983-01-25 |