Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4960843 | Method of producing poly(vinyl chloride)-based resins | Masahiko Yazawa, Hiroshi Kaneko | 1990-10-02 |
| 4857617 | Process for producing a high softening point hydrocarbon resin | Koji Tanaka, Yasushi Sakai | 1989-08-15 |