Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5900445 | Erasable ink composition containing a polymer dye obtained from ethylenic monomers and marking instrument containing same | David C. Villiger, Aiying Wang, Jeffery H. Banning, Barry W. Chadwick | 1999-05-04 |
| 5852072 | Erasable ink composition containing a waterborne polyurethane urea | Jeffery H. Banning, David C. Villiger, Aiying Wang, Barry W. Chadwick | 1998-12-22 |
| 5852073 | Erasable ink composition containing a polymer-encapsulated colorant obtained by polymerizing monomer in the presence of solid colorant particles | David C. Villiger, Aiying Wang, Jeffery H. Banning, Barry W. Chadwick | 1998-12-22 |
| 5756561 | Erasable ink composition containing a graft-polymerized dye | Aiying Wang, Jeffery H. Banning, David C. Villiger, Barry W. Chadwick | 1998-05-26 |
| 5661197 | Erasable ink composition containing a polymer-encapsulated colorant derived from monomer containing dissolved colorant | David C. Villiger, Aiying Wang, Jeffery H. Banning, Barry W. Chadwick | 1997-08-26 |
| 5637638 | Erasable ink composition containing a waterborne polyurethane-urea derived from an aromatic amine dye monomer and marking instrument containing same | David C. Villiger, Jeffery H. Banning, Barry W. Chadwick, Aiying Wang | 1997-06-10 |