Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5730845 | Method and apparatus of producing an organo-nitrogen compound | David Harper, David J. Wheeler | 1998-03-24 |
| 4243998 | Safety circuit for a semiconductor element | Heinrich Schlangenotto, Friedhelm Sawitzki | 1981-01-06 |