Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870146 | Process for producing a light color high softening point hydrocarbon resin | Yasushi Sakai, Tetsuo Fujii, Michio Saito, Akio Kiyohara | 1989-09-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870146 | Process for producing a light color high softening point hydrocarbon resin | Yasushi Sakai, Tetsuo Fujii, Michio Saito, Akio Kiyohara | 1989-09-26 |