Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8094646 | Controlling jittering effects | Jeffrey Steinheider, Gerald Britton | 2012-01-10 |
| 7697573 | Controlling jittering effects | Jeffrey Steinheider, Gerald Britton | 2010-04-13 |
| 4359291 | Multicolor pen | — | 1982-11-16 |
| 4274102 | Multi-element writing instrument | — | 1981-06-16 |
| 4236418 | Multi-element writing instrument | — | 1980-12-02 |