Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870146 | Process for producing a light color high softening point hydrocarbon resin | Tetsuo Fujii, Michio Saito, Motoaki Munekata, Akio Kiyohara | 1989-09-26 |
| 4857617 | Process for producing a high softening point hydrocarbon resin | Koji Tanaka, Katsuo Takemoto | 1989-08-15 |