Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4224495 | Electrical discharge machining apparatus with compound electrode movement | Paul Fricker, Hans Knecht, Giampaolo Pierobon, Bernd Schumacher, Arnold Zimmerman | 1980-09-23 |