Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4817545 | Thread take-up lever device for sewing machines | Osamu Tanaka | 1989-04-04 |
| 4803936 | Thread tension device for overedge sewing machines | Osamu Koshinaka | 1989-02-14 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4817545 | Thread take-up lever device for sewing machines | Osamu Tanaka | 1989-04-04 |
| 4803936 | Thread tension device for overedge sewing machines | Osamu Koshinaka | 1989-02-14 |