Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4620355 | Method for manufacturing a heat insulating sash bar | Nobushige Doguchi | 1986-11-04 |
| 4563322 | Method and apparatus for continuously filling grooves in sash bars with heat insulating material | Nobushige Doguchi | 1986-01-07 |