Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6672021 | Swinging door structure and inner frame in which inner frame is removable | Mitsugi Kusano, Kimio Numaguchi, Norio Hidaka, Yasuhiro Takagi, Tetsuji Nagaoka | 2004-01-06 |