Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4617449 | Heating device for utilizing the skin effect of alternating current | David Parman | 1986-10-14 |
| 4532375 | Heating device for utilizing the skin effect of alternating current | David Parman | 1985-07-30 |
| 4436565 | Method of making a heating device for utilizing the skin effect of alternating current | David Parman | 1984-03-13 |