Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5054949 | Cap for writing implement with air vent | — | 1991-10-08 |
| D319844 | Ball point pen | Gerald Grotsch | 1991-09-10 |
| D319845 | Mechanical pen | Gerald Grotsch | 1991-09-10 |
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5054949 | Cap for writing implement with air vent | — | 1991-10-08 |
| D319844 | Ball point pen | Gerald Grotsch | 1991-09-10 |
| D319845 | Mechanical pen | Gerald Grotsch | 1991-09-10 |