Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4707283 | Electrochromic material and lubricant | Shoji Yamanaka | 1987-11-17 |
| 4669830 | Electrochromic material and lubricant | Shoji Yamanaka | 1987-06-02 |
| 4562056 | Electrochromic material and lubricant | Shoji Yamanaka | 1985-12-31 |