Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886004 | Needle thread tension control including separate stopping and adjustable pre-tension devices | Toshio Sasaki | 1989-12-12 |
| 4869186 | Needle thread tension control system with differential clamping | — | 1989-09-26 |
| 4856443 | Needle thread tensioning device for a swing machine | Noboru Ito, Yukio Yamamura | 1989-08-15 |