Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5494423 | Rotary compressor and blade tip structure | Akihiko Ishiyama, Ken'ichi Kawashima, Hirokatsu Kohsokabe, Shoichi Nakashima, Hiroaki Hata +3 more | 1996-02-27 |
| 5423664 | Iron-base alloy for rotary type compressors | Tadashi Iizuka, Kazushi Fukuda, Akihiko Ishiyama, Shoichi Nakashima, Hideki Nakamura | 1995-06-13 |