Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684262 | Pitch-modified microphone and audio reproducing apparatus | Masakazu Nakamura | 1997-11-04 |
| 5652401 | Recording media, reproducing apparatus and method for karaoke use including means for adding a harmonizing signal to a singer's voice | — | 1997-07-29 |
| 5632597 | Thread groove type vacuum pump | Seiji Hiroki, Tetsuya Abe, Yoshio Murakami, Masashi Iguchi | 1997-05-27 |