Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D966011 | Cushion material | Yoji Shimura, Akihiko Kawasaka | 2022-10-11 |
| D927890 | Mattress | Yoji Shimura, Akihiko Kawasaka | 2021-08-17 |
| D927227 | Mattress | Yoji Shimura, Akihiko Kawasaka | 2021-08-10 |