Patents per Year
Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 7520152 | Lock device and system employing a door lock device | Russ C. Sabo | 2009-04-21 | $13,685,000 |
| 5787173 | Cryptographic key management method and apparatus | Edward M. Seheidt | 1998-07-28 | |
| 5410599 | Voice and data encryption device | Michael Wickham | 1995-04-25 | |
| 5375169 | Cryptographic key management method and apparatus | Edward M. Seheidt | 1994-12-20 | |
| D348233 | Capitol flag display | — | 1994-06-28 | |
| 4450740 | Rotary envelope cutting apparatus | William A. Chapman | 1984-05-29 | $6,733,000 |
| 4429603 | Rotary envelope cutting method | William A. Chapman | 1984-02-07 | $7,506,000 |