Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4514781 | Corona device | Paul E. Plasschaert, Dolf Landheer | 1985-04-30 |
| 4476387 | Corona charging apparatus | Richard A. Fotland | 1984-10-09 |
| 4446371 | Corona charging apparatus | — | 1984-05-01 |
| 4379969 | Corona charging apparatus | Richard A. Fotland | 1983-04-12 |