Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7690526 | Closure assembly | — | 2010-04-06 |
| D491062 | Threaded plug for a closure assembly | — | 2004-06-08 |
| 4794591 | Digital voice switch for a multi-port conference circuit | Arthur L. Walsh, John Stewart Young | 1988-12-27 |