Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33345 | Toroid transformers and secondary windings | Robert D. Sylvester, Jr., Paul C. Horn | 1990-09-18 |
| 4811477 | Method of winding toroid transformers | Robert D. Sylvester, Jr., Paul C. Horn | 1989-03-14 |
| 4631511 | Toroid transformers and secondary windings | Robert D. Sylvester, Jr., Paul C. Horn | 1986-12-23 |