NIHON DEMPA KOGYO CO., LTD.
632Patents
487Active
632Granted
58Portfolio score
Filing activity: Dec 30, 1974 → Feb 28, 2024 · 241 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5081431A | Digital temperature-compensated oscillator | Electricity | 72 | Expired |
| US5136817A | Automatic lapping apparatus for piezoelectric materials | Performing Operations; Transporting | 57 | Expired |
| US7174620B2 | Method of manufacturing thin quartz crystal wafer | Emerging Cross-Sectional Technologies | 44 | Expired |
| US7378916B2 | Crystal oscillator device, oscillation method and heater | Electricity | 42 | Expired |
| USD703332S1 | Ultrasonic probe | General | 42 | Active |
| US7135810B2 | Surface mount crystal oscillator | Electricity | 40 | Expired |
| USD704844S1 | Ultrasonic probe | General | 29 | Active |
| US7378780B2 | Surface mount type crystal oscillator | Electricity | 27 | Active |
| US7564177B2 | Crystal unit having stacked structure | Electricity | 24 | Active |
| US6445254B1 | Crystal oscillator and method of bonding IC chip useful for fabricating crystal oscillator | Electricity | 22 | Expired |
| US7514852B2 | Piezooscillator | Electricity | 22 | Active |
| US7135805B2 | Surface acoustic wave transducer | Electricity | 19 | Expired |
| USD703333S1 | Ultrasonic probe | General | 19 | Active |
| USD598108S1 | Ultrasonic probe | General | 19 | Expired |
| USD703330S1 | Ultrasonic probe | General | 18 | Active |
| US8618721B2 | Method of manufacturing the piezoelectric device and the same | Emerging Cross-Sectional Technologies | 18 | Active |
| US7034441B2 | Surface mount crystal unit and surface mount crystal oscillator | Electricity | 18 | Expired |
| USD546460S1 | Ultrasonic probe | General | 16 | Expired |
| US6798384B2 | Multi-element planar array antenna | Electricity | 16 | Expired |
| USD544606S1 | Ultrasonic probe | General | 16 | Expired |
| US7088032B2 | Crystal oscillator | Electricity | 15 | Expired |
| US4639632A | Piezoelectric resonator mountings | Electricity | 15 | Expired |
| US7764145B2 | Piezoelectric resonator, method of manufacturing the same and electronic part using the same | Electricity | 14 | Active |
| US7471162B2 | Surface mount type temperature-compensated crystal oscillator | Electricity | 14 | Active |
| US7382204B2 | Constant temperature crystal oscillator | Electricity | 14 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.