Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5079276 | Method of manufacturing polyurethane foam | Sadao Kumasaka, Koretoshi Katsuki, Osamu Fujii, Shigeo Kuga | 1992-01-07 |
| 4988271 | Apparatus for producing polyurethane foam | Sadao Kumasaka, Koretoshi Katsuki, Osamu Fujii, Tutomu Yamamoto, Ryoji Nagamine +4 more | 1991-01-29 |
| 4814515 | Method of manufacturing a modified polyhydroxy compound | Sadao Kumasaka, Hirokazu Wakabayashi | 1989-03-21 |
| 4666393 | Apparatus for manufacturing polyurethane foam slabs in a batch | Sadao Kumasaka, Osamu Fujii, Goro Yoneyama, Masao Idei | 1987-05-19 |
| 4610922 | Asphalt impregnated foam and method of producing the same | Sadao Kumasaka, Koretoshi Katsuki, Ryoji Nagamine, Hiroshi Taniguchi | 1986-09-09 |
| 4520141 | Method for manufacturing phenolic resin foam | Sadao Kumasaka | 1985-05-28 |
| 4517312 | Process for regenerating resin | Sadao Kumasaka, Shigeo Horikoshi, Tamaki Kamanaka, Hiroshi Taniguchi | 1985-05-14 |
| 4463951 | Ball | Sadao Kumasaka | 1984-08-07 |
| 4352651 | Mold equipment | Sadao Kumasaka, Goro Yoneyama, Kazuo Hashimoto | 1982-10-05 |
| 4338271 | Method for manufacturing a low density synthetic resin body | Sadao Kumasaka, Shigeo Horikoshi, Tokio Tsuchiya, Masashi Numabe | 1982-07-06 |
| 4325688 | Mold equipment | Sadao Kumasaka, Goro Yoneyama, Junichi Seki | 1982-04-20 |