Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5609115 | Buttonhole closing device for lockstitch bar tacking sewing machine | Koichi Nakayama, Katsuo Hiratsuka | 1997-03-11 |
| 5481995 | Bar tacking stitch pattern | Katsuo Hiratsuka, Koichi Nakayama | 1996-01-09 |
| 5477795 | Thread trimming device for a lockstitch bar tacking sewing machine | Koichi Nakayama, Katsuo Hiratsuka | 1995-12-26 |
| 5046437 | Device in a button sewing machine for maintaining looseness in needle thread while preventing the thread from being pulled out of the sewing needle | Katsuo Hiratsuka, Imao Yazaki, Koichi Nakayama | 1991-09-10 |
| 4967678 | Speed controller for controlling revolution speed of upper shaft of cycle sewing machine | Katsuo Hiratsuka, Koichi Nakayama, Imao Yazaki | 1990-11-06 |