Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6019352 | Vice like grip for chains | — | 2000-02-01 | |
| 5201906 | Anti-piggybacking: sensor system for security door to detect two individuals in one compartment | Milan Schwarz | 1993-04-13 | |
| 5097454 | Security door with improved sensor for detecting unauthorized passage | Milan Schwarz | 1992-03-17 | |
| 5012455 | Security door with improved sensor for detecting unauthorized passage | Milan Schwarz | 1991-04-30 | |
| 4895028 | Method of pull-testing wire connectors on an electrical device | — | 1990-01-23 | |
| 4707854 | Telephone with digit cancellation | — | 1987-11-17 | |
| 4526396 | Lockable hitch pin | — | 1985-07-02 | |
| 4442486 | Protected programmable apparatus | — | 1984-04-10 | $654,000 |