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 | Yasushi Sakai, Michio Saito, Motoaki Munekata, Akio Kiyohara | 1989-09-26 |
| 4867561 | Apparatus for optically detecting an extraneous matter on a translucent shield | Hirohito Shioya, Tiaki Mizuno, Tadashi Kamada, Yasuaki Makino, Yoshimi Yoshino +1 more | 1989-09-19 |