Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5007462 | Synthetic resin underground pipe having high pressure-withstanding capability | — | 1991-04-16 |
| 4862924 | Flexible hard pipe | — | 1989-09-05 |
| 4830694 | Method of manufacturing pressure withstanding pipe | — | 1989-05-16 |
| 4800928 | Flexible pipe | — | 1989-01-31 |
| 4796672 | Pressure-withstanding pipe | — | 1989-01-10 |
| D296356 | Corrugated pipe | — | 1988-06-21 |
| D296355 | Corrugated pipe | — | 1988-06-21 |
| 4628966 | Synthetic resin pipe for underground use | — | 1986-12-16 |
| 4624603 | Underground drain pipe | — | 1986-11-25 |
| 4611636 | Reinforced underground pipe | — | 1986-09-16 |
| 4587145 | Flexible hose | — | 1986-05-06 |
| 4487232 | Doubled-walled corrugated synthetic resin pipe | — | 1984-12-11 |
| D270997 | Hose clamp | — | 1983-10-18 |
| D268735 | Hose clamp | — | 1983-04-26 |
| 4350547 | Flexible hose | — | 1982-09-21 |
| 4343672 | Method and apparatus for producing tube | — | 1982-08-10 |
| 4230899 | Electroconductive hose for cleaner | — | 1980-10-28 |