Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7143870 | Elevator hall door and door hanger apparatus | Masato Watabe | 2006-12-05 |
| 6988592 | Door and door hanger device at elevator landing | Masato Watabe | 2006-01-24 |
| 6710160 | Polyamic acid, polyimide, process for producing these, and film of the polyimide | Wataru Yamashita, Katsuji Watanabe, Hideaki Oikawa | 2004-03-23 |
| 6407242 | Quinoline derivative and use of same | Tadashi Okuma, Hideki Ikuta, Tatsuya Nagayoshi, Akira Ogiso | 2002-06-18 |
| 6132640 | Quinoline derivative and use of same | Tadashi Okuma, Hideki Ikuta, Tatsuya Nagayoshi, Akira Ogiso | 2000-10-17 |