Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6113268 | Weighted carrying case | — | 2000-09-05 |
| 5991722 | Speech synthesizer system for use with navigational equipment | Glenn R. Greenough | 1999-11-23 |
| 5521983 | Speaker system for use in high background noise environments | Glenn R. Greenough, Donald M. Thompson | 1996-05-28 |
| D274667 | Garbage bag hanger | — | 1984-07-10 |