Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5996465 | Oil pressure device | Sumio Morikawa | 1999-12-07 |
| 5860214 | Shearing machine with sickle-shaped blade | Sumio Morikawa, Toshiji Ohga, Masahiro Kondoh | 1999-01-19 |
| 5769341 | Stabilized crushing device | Sumio Morikawa, Toshiji Ohga | 1998-06-23 |
| 5743476 | Concrete crusher | Sumio Morikawa, Toshiji Ohga | 1998-04-28 |
| 5671892 | Shearing machine | Sumio Morikawa | 1997-09-30 |
| 5619881 | Double-scissors cutter | Sumio Morikawa, Noboru Nakayama | 1997-04-15 |
| 5478019 | Universal breaker | Sumio Morikawa | 1995-12-26 |
| 5385311 | Breaking equipment | Sumio Morikawa, Toshiji Ohga, Hiroyuki Satone | 1995-01-31 |
| 5292079 | Concrete breaker with protective cover | — | 1994-03-08 |