HITACHI CONSTRUCTION MACHINERY CO., LTD.
1,487Patents
1,032Active
1,487Granted
60Portfolio score
Filing activity: Jan 23, 1974 → Mar 30, 2023 · 216 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD549721S1 | Graphic user interface for display for construction machine | General | 157 | Expired |
| USD549722S1 | Graphic user interface for display for construction machine | General | 130 | Expired |
| US4448269A | Cutter head for pit-boring machine | Fixed Constructions | 115 | Expired |
| US4369625A | Drive system for construction machinery and method of controlling hydraulic circuit means thereof | Fixed Constructions | 106 | Expired |
| US5835874A | Region limiting excavation control system for construction machine | Fixed Constructions | 72 | Expired |
| US5662822A | Dam bar cutting apparatus and dam bar cutting method | Electricity | 70 | Expired |
| US5129044A | Position/force controlling apparatus for working machine with multiple of degrees of freedom | Physics | 70 | Expired |
| US4489551A | Failure detection system for hydraulic pump | Mechanical Engineering; Lighting; Heating | 70 | Expired |
| US6810362B2 | Construction machine managing method and system, and arithmetic processing device | Emerging Cross-Sectional Technologies | 68 | Expired |
| USD684598S1 | Hydraulic excavator | General | 67 | Active |
| US5048293A | Pump controlling apparatus for construction machine | Fixed Constructions | 65 | Expired |
| US5203168A | Hydraulic driving circuit with motor displacement limitation control | Mechanical Engineering; Lighting; Heating | 65 | Expired |
| US4967557A | Control system for load-sensing hydraulic drive circuit | Mechanical Engineering; Lighting; Heating | 65 | Expired |
| US4686440A | Fine positioning device | Electricity | 62 | Expired |
| US5513875A | Lockable suspension system for a work vehicle having a stabilizing link | Performing Operations; Transporting | 61 | Expired |
| USD549738S1 | Wheel loader | General | 61 | Expired |
| USD715808S1 | Portion of a display screen for a self-propelled working machine with graphical user interface | General | 60 | Active |
| US6229607A | Fine movement mechanism unit and scanning probe microscope | Emerging Cross-Sectional Technologies | 59 | Expired |
| US6922925B2 | Construction machine | Fixed Constructions | 57 | Expired |
| US4984567A | Apparatus for measuring intracranial pressure | Human Necessities | 57 | Expired |
| US5335547A | Ultrasonic flaw detector | Physics | 57 | Expired |
| US6450284B1 | Cab for construction machinery | Fixed Constructions | 57 | Expired |
| US4627013A | Load weight indicating system for load moving machine | Fixed Constructions | 56 | Expired |
| US4606313A | Method of and system for controlling hydraulic power system | Mechanical Engineering; Lighting; Heating | 55 | Expired |
| USD890200S1 | Display screen with graphical user interface for a construction machine | General | 52 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.