Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5601376 | Retractable writing instrument having replaceable cartridge | Edgar B. Chiswell | 1997-02-11 |
| 5336006 | Retractable writing instrument having replaceable cartridge | Edgar B. Chiswell | 1994-08-09 |