Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4350548 | Method and apparatus for providing the inner surface of a pipe line with a lining | Katsuaki Zenbayashi, Akio Morinaga, Masao Hirayama | 1982-09-21 |
| 4334943 | Method for smoothly evaginating a tubular material under pressure | Katsuaki Zenbayashi, Akio Morinaga, Masao Hirayama | 1982-06-15 |