Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842781 | Colored polarizing film and method of making same | Tsutomu Nishizawa, Yasuyuki Yamada, Shin Hosonuma | 1989-06-27 |
| 4824882 | Polarizing film | Katsuji Nakamura, Shin Hosonuma, Masakatsu Nakatsuka, Tsutomu Nishizawa | 1989-04-25 |