Hitachi Koki Co., Ltd.
1,282Patents
396Active
1,282Granted
53Portfolio score
Filing activity: Mar 2, 1977 → Feb 9, 2018 · 221 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4628459A | Computerized circuit arrangement for jig saw | Emerging Cross-Sectional Technologies | 1,387 | Expired |
| US9314908B2 | Impact tool | Performing Operations; Transporting | 1,026 | Active |
| US8931576B2 | Power tool for performing soft-start control appropriated for motor load | Performing Operations; Transporting | 1,008 | Active |
| US7196911B2 | DC power source unit with battery charging function | Electricity | 981 | Expired |
| US10099303B2 | Electric power tool | Performing Operations; Transporting | 932 | Active |
| US6886730B2 | Combustion-powered driving tool | Performing Operations; Transporting | 856 | Expired |
| US4672398A | Ink droplet expelling apparatus | Performing Operations; Transporting | 292 | Expired |
| US5621524A | Method for testing ink-jet recording heads | Performing Operations; Transporting | 141 | Expired |
| US5785227A | Adjustment mechanism for adjusting depth at which pneumatic nailing machine drives nails into workpiece | Performing Operations; Transporting | 127 | Expired |
| US7390460B2 | Control device for automatic liquid handling system | Emerging Cross-Sectional Technologies | 118 | Active |
| US6683439B2 | DC power source unit with battery charging function | Electricity | 116 | Expired |
| US8857692B2 | Fastener driving tool | Performing Operations; Transporting | 112 | Active |
| US5896154A | Ink jet printer | Performing Operations; Transporting | 107 | Expired |
| US5873510A | Repetitive striking type pneumatically operated nail gun | Performing Operations; Transporting | 103 | Expired |
| US7185998B2 | Power tool | Emerging Cross-Sectional Technologies | 99 | Expired |
| US5164744A | Thermal transfer printing apparatus | Performing Operations; Transporting | 94 | Expired |
| US7521892B2 | Cordless power tool with overcurrent protection circuit permitting the overcurrent condition during specified time periods | Emerging Cross-Sectional Technologies | 92 | Active |
| US6007193A | Method and apparatus for removing air bubbles from hot melt ink in an ink-jet printer | Performing Operations; Transporting | 89 | Expired |
| US4938642A | Portable electric router | Emerging Cross-Sectional Technologies | 86 | Expired |
| USD622661S1 | Battery pack | General | 81 | Expired |
| US5697144A | Method of producing a head for the printer | Emerging Cross-Sectional Technologies | 78 | Expired |
| US5129467A | Electric hammer drill having dust collecting device | Emerging Cross-Sectional Technologies | 74 | Expired |
| USD699672S1 | Rechargeable battery | General | 73 | Active |
| US6333790A | Printing system wherein printer connected to one computer is managed by another computer over a network | Physics | 71 | Expired |
| USD844558S1 | Storage battery | General | 69 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.