Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE35180 | High frequency thermode driven device employing one-turn-secondary transformers | Richard Porterfield | 1996-03-19 |
| 5068509 | High frequency thermode driven device employing one-turn-secondary transformers | Richard Porterfield | 1991-11-26 |