Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5716217 | Water base ink compositions for neon boards | Yasuji Okuda | 1998-02-10 |
| 5677363 | Water based erasable ink compositions | — | 1997-10-14 |
| 5561175 | Water base erasable ink compositions | — | 1996-10-01 |
| 5004763 | Water base erasable ink compositions | — | 1991-04-02 |
| 4954174 | Erasable ink compositions | — | 1990-09-04 |