Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33607 | Auto-playing apparatus | Keiji Yuzawa, Naoaki Matsumoto, Takehiko Kayahara, Naofumi Tateishi | 1991-06-11 |
| 4624171 | Auto-playing apparatus | Keiji Yuzawa, Naoaki Matsumoto, Takehiko Kayahara, Naofumi Tateishi | 1986-11-25 |