Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4384839 | Core mold for bent pipes | Masakatsu Mayumi, Takeshi Okuyama | 1983-05-24 |
| 4364894 | Method for molding a reinforced plastic tubular body having a socket, and mold therefore | Masakatsu Mayumi, Takeshi Okuyama | 1982-12-21 |
| 4345625 | Pipe joints of reinforced resin and process for their molding | Masakatsu Mayumi, Sigeharu Fujiwara | 1982-08-24 |
| 4263249 | Method for producing reinforced plastic tubular body having annular grooves, and mold therefor | Masakatu Mayumi, Sigeharu Fujiwara, Takesi Okuyama | 1981-04-21 |
| 4260445 | Process for producing thick reinforced plastic articles | Masakatsu Mayumi, Sigeharu Fujiwara | 1981-04-07 |
| 4243457 | Method of molding pipe joints of reinforced resin | Masakatsu Mayumi, Sigeharu Fujiwara | 1981-01-06 |