Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7178555 | Pressure relief valve | Dave Carroll | 2007-02-20 |
| 5561574 | Method for manufacturing lifter for a disc cartridge and feed stock therefor | Karl K. Hoffman | 1996-10-01 |
| 4620247 | Diskette spring and diskette | Walter A. Papciak, Karl K. Hoffman, Adam Wieczorek | 1986-10-28 |