Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4411701 | Waterproof gypsum molded product | Eiichi Hirai, Masao Endo | 1983-10-25 |
| 4341560 | Waterproof gypsum molded product | Eiichi Hirai, Masao Endo, Toru Nishino | 1982-07-27 |
| 4330589 | Foamed gypsum moulded articles and production thereof | Eiichi Hirai, Masao Endo, Toru Nishino | 1982-05-18 |
| 4246361 | Method for producing flame- and smoke-resistant polyurethane foam sheet by incorporation of a urea derivative in reaction mixture | Toshio Yukuta, Takashi Ohashi, Minoru Kojima | 1981-01-20 |