RION CO., LTD.
109Patents
62Active
109Granted
52Portfolio score
Filing activity: Dec 12, 1974 → Dec 21, 2021 · 14 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5347584A | Hearing aid | Electricity | 162 | Expired |
| US5187746A | Structure of battery receiving chamber | Emerging Cross-Sectional Technologies | 95 | Expired |
| USD354568S | Hearing aid | General | 80 | Expired |
| US4456795A | Behind-the-ear type hearing aid | Electricity | 75 | Expired |
| US6041128A | Battery receiving chamber and hearing aid | Electricity | 68 | Expired |
| US4489330A | Electromagnetic induction coil antenna | Electricity | 51 | Expired |
| US4334542A | Artificial palate device for electropalatograph | Physics | 50 | Expired |
| US4490585A | Hearing aid | Electricity | 49 | Expired |
| US4519399A | Method for measuring the degree of nasality | Human Necessities | 48 | Expired |
| US5010575A | Audio current pick-up device | Electricity | 43 | Expired |
| USD415574S | Round profile | General | 33 | Expired |
| US5387875A | Output circuit capable of driving a vibration device | Electricity | 27 | Expired |
| US6813303B2 | Laser oscillator and light scattering particle detector using the same | Physics | 24 | Expired |
| USD368309S | Earplug for a hearing aid | General | 20 | Expired |
| US4310002A | Electropalatograph | Human Necessities | 19 | Expired |
| USD375556S | Hearing aid | General | 18 | Expired |
| US8111849B2 | Hearing aid | Electricity | 18 | Active |
| USD412584S | Profile | General | 17 | Expired |
| US7343021B2 | Optimum solution method, hearing aid fitting apparatus utilizing the optimum solution method, and system optimization adjusting method and apparatus | Electricity | 16 | Expired |
| USD719472S1 | Multifunction measuring instrument | General | 15 | Active |
| US6465802B1 | Particle measurement apparatus flow cell useful for sample fluids having different refractive indexes | Physics | 14 | Expired |
| US4475230A | Hearing aid | Electricity | 13 | Expired |
| USD497001S1 | Hearing aid | General | 13 | Expired |
| US4287895A | Electropalatograph | Human Necessities | 13 | Expired |
| US6498992B1 | Defect diagnosis method and defect diagnosis apparatus | Physics | 13 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.