FUJI OOZX INC.
68Patents
2Active
68Granted
36Portfolio score
Filing activity: Jan 11, 1993 → Mar 16, 2021 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5427141A | Pressure fluid control valve device | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5983847A | Electric valve drive device in an internal combustion engine | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US5485815A | Poppet valve device | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5370364A | Titanium alloy engine valve shaft structure | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US6382246B2 | Valve position detector | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5431136A | Internal combustion valve having an iron based hard-facing alloy contact surface | Chemistry; Metallurgy | 15 | Expired |
| US5769037A | Hollow valve in an internal combustion engine | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6131603A | Ti alloy poppet valve and surface treatment thereof | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5740769A | Method of adjusting a valve clearance | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5455078A | Method of roughening and coating the contact surface of a valve lifter | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US5799683A | Poppet valve and method of manufacturing it | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6293303A | Valve position detector | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6354001B1 | Method of manufacturing a Ti alloy poppet value | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5611306A | Internal combustion engine valve | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US5662078A | Intake valve device for preventing adhesion of deposits | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5551908A | Centerless grinder and wheel truing device therefor | Performing Operations; Transporting | 7 | Expired |
| US6691910B2 | Method of joining different metal materials by friction welding | Performing Operations; Transporting | 6 | Expired |
| US5239953A | Hydraulic tappet for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US5674111A | Method of processing a workpiece | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6619251B2 | Tappet for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US6295731A | Method of hardening a valve face of a poppet valve | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6073912A | Al or Al alloy poppet valve and a method of manufacturing the same | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5988123A | Method of controlling an electric valve drive device and a control system therefor | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US5675969A | Exhaust gas control device in an internal combustion engine | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US5269268A | Tappet in an internal combustion engine and method of manufacturing the same | Emerging Cross-Sectional Technologies | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.