NGK SPARK PLUG CO., LTD.
2,640Patents
1,349Active
2,640Granted
56Portfolio score
Filing activity: Apr 8, 1974 → Feb 15, 2023 · 399 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5279886A | Alumina sintered body | Emerging Cross-Sectional Technologies | 390 | Expired |
| US7876030B2 | Ultrasonic transducer which is either crimped or welded during assembly | Human Necessities | 337 | Active |
| US6431743B1 | Method of preparing and extruding a chemical agent using a kneader and chemical-agent extrusion assisting tool | Performing Operations; Transporting | 121 | Expired |
| US6952049B1 | Capacitor-built-in type printed wiring substrate, printed wiring substrate, and capacitor | Electricity | 121 | Expired |
| US6573458B1 | Printed circuit board | Electricity | 117 | Expired |
| US7077133B2 | Oxygen enriching apparatus, controller, and recording medium | Human Necessities | 107 | Expired |
| US4304576A | Silicon nitride ceramic tools and a process for their production | Emerging Cross-Sectional Technologies | 101 | Expired |
| US5092898A | Artificial joint | Human Necessities | 93 | Expired |
| US5468997A | Integrated circuit package having a multilayered wiring portion formed on an insulating substrate | Electricity | 79 | Expired |
| US4884066A | Deterioration detector system for catalyst in use for emission gas purifier | Emerging Cross-Sectional Technologies | 78 | Expired |
| US6512182B2 | Wiring circuit board and method for producing same | Emerging Cross-Sectional Technologies | 76 | Expired |
| US6323439A | Metal core multilayer resin wiring board with thin portion and method for manufacturing the same | Emerging Cross-Sectional Technologies | 74 | Expired |
| US4505807A | Oxygen sensor | Emerging Cross-Sectional Technologies | 72 | Expired |
| US6837244B2 | Oxygen enriching apparatus, controller for the oxygen enriching apparatus, and recording medium for the controller | Human Necessities | 71 | Expired |
| US5017826A | Rapid heat-dissipating type spark plug for internal combustion engines | Electricity | 67 | Expired |
| US5357750A | Method for detecting deterioration of catalyst and measuring conversion efficiency thereof with an air/fuel ratio sensor | Emerging Cross-Sectional Technologies | 66 | Expired |
| US6229253A | Spark plug with specific gap between insulator and electrodes | Electricity | 64 | Expired |
| US5993535A | Calcium phosphate cement and calcium phosphate cement composition | Chemistry; Metallurgy | 63 | Expired |
| US5286926A | Integrated circuit package and process for producing same | Electricity | 63 | Expired |
| US5901050A | Wired base plate and package for electronic parts | Electricity | 63 | Expired |
| US6052040A | Dielectric duplexer with different capacitive coupling between antenna pad and transmitting and receiving sections | Electricity | 62 | Expired |
| US5508582A | Spark plug insulator for use in internal combustion engine | Electricity | 62 | Expired |
| US6617769B2 | Spark plug and mounting structure of the same | Electricity | 61 | Expired |
| US6551745B2 | Thin lithium battery with slurry cathode | Emerging Cross-Sectional Technologies | 60 | Expired |
| US5007932A | Artificial bone joint | Human Necessities | 59 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.