Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4353680 | Exhaust fan with removable face cover | Shunji Hiraoka, Makoto Niwa | 1982-10-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4353680 | Exhaust fan with removable face cover | Shunji Hiraoka, Makoto Niwa | 1982-10-12 |