Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D319265 | Combined barrel sign and support member therefor | Gregory G. Hollenkemp | 1991-08-20 |
| D314496 | Child's light switch extension | — | 1991-02-12 |
| D313630 | Barrel sign | Gregory G. Hollenkemp | 1991-01-08 |