Hirokatsu Yamamoto
37Patents
8h-index
32Co-inventors
75Inventor score
Filing activity: Dec 23, 2002 → Jun 30, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8678106B2 | Rotary impact tool | Performing Operations; Transporting | 78 | Active |
| US8179069B2 | Electric power tool, control unit and recording medium | Electricity | 66 | Active |
| US7007762B2 | Power tool | Performing Operations; Transporting | 59 | Expired |
| US6933689B2 | Power tools | Electricity | 24 | Expired |
| US6819022B2 | Brushless motor for power tool | Electricity | 22 | Expired |
| US7053567B2 | Power tools | Electricity | 15 | Expired |
| US9737984B2 | Power tool | Performing Operations; Transporting | 8 | Active |
| US10953532B2 | Electric power tool configured to detect twisted motion | Performing Operations; Transporting | 8 | Active |
| US9425730B2 | Apparatus for estimating quantity of state relating to motor, and electric tool | Electricity | 7 | Active |
| US8616300B2 | Power tool having an illuminator | Performing Operations; Transporting | 5 | Active |
| US9621081B2 | Motor- driven apparatus and method for driving the same | Electricity | 4 | Active |
| US10780563B2 | Electric power tool and method of controlling rotational speed of motor in electric power tool | Performing Operations; Transporting | 4 | Active |
| US10883660B2 | Electric power tool, and method for detecting kickback of electric power tool from workpiece | Performing Operations; Transporting | 3 | Active |
| US8193753B2 | Motor controller and electric power tool having the same | Electricity | 2 | Active |
| US11325228B2 | Rotary impact tool | Performing Operations; Transporting | 1 | Active |
| US11248570B2 | Engine apparatus | Emerging Cross-Sectional Technologies | 1 | Active |
| US10954947B2 | Backpack-type blower | Emerging Cross-Sectional Technologies | 1 | Active |
| US10953524B2 | Impact fastening tool | Performing Operations; Transporting | 1 | Active |
| US10486280B2 | Electric working machine, and method for determining load-imposed state of electric working machine | Performing Operations; Transporting | 1 | Active |
| US11865924B2 | Cart | Emerging Cross-Sectional Technologies | 1 | Active |
| US10913141B2 | Impact tool | Performing Operations; Transporting | 1 | Active |
| US8264189B2 | Motor controller and electric power tool having the same | Electricity | 1 | Active |
| US11215146B2 | Engine device | Emerging Cross-Sectional Technologies | 1 | Active |
| US11230983B2 | Engine device | Emerging Cross-Sectional Technologies | 1 | Active |
| US12330510B2 | Cart | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.