Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4251175 | Pipe burr cutting apparatus | Keiichi Hara | 1981-02-17 |
| 4233928 | Inner burr cutting, inner face cleaning and inner face painting apparatus for long pipes of small and medium diameters | Keiichi Hara | 1980-11-18 |