Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6962623 | Hardened calcium silicate having high strength | Hiroyoshi Matsuyama, Kunio Matsui | 2005-11-08 |
| 6948657 | Document verification system | Hajime Sugino, Kensuke Ito | 2005-09-27 |