Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5305634 | Weathering test method and sample holder used therein | Shigeru Suga, Shigeo Suga | 1994-04-26 |
| 4704903 | Light fastness/weather resistance accelerated test machine with an air mixing regulator | Shigeru Suga, Kiyoshi Chaki, Shigeo Suga, Katsuaki Mitamura | 1987-11-10 |