Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5216040 | Rigid polyurethane foam and process for producing the same | Reishi Naka, Isao Kobayashi, Kousuke Tanaka, Katuhiko Gotoo | 1993-06-01 |
| 5173517 | Rigid polyurethane foam and heat insulator obtained therefrom | Reishi Naka, Isao Kobayashi | 1992-12-22 |
| 5034425 | Rigid polyurethane foam, process for producing the same, and heat insulators and refrigerators using such polyurethane foam | Reishi Naka, Isao Kobayashi | 1991-07-23 |
| RE33290 | Rigid polyurethane foam and process for producing the same | Reishi Naka | 1990-08-07 |
| 4742089 | Rigid polyurethane foam and process for producing the same | Reishi Naka | 1988-05-03 |