Rhythm Watch Co., Ltd.
78Patents
19Active
78Granted
40Portfolio score
Filing activity: Oct 24, 1974 → Nov 18, 2019 · 10 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD892293S1 | Electric fan | General | 35 | Active |
| US6229768A | Trick action type clock | Physics | 28 | Expired |
| US6288977A | Time signal repeater and time correction system using the same | Physics | 26 | Expired |
| US4421418A | Clock adjustment switch system | Physics | 22 | Expired |
| USD734172S1 | Clock | General | 19 | Active |
| US4247933A | Time striking device for timepiece | Physics | 18 | Expired |
| US6814670B2 | Device for controlling the amplitude of a swinging body | Performing Operations; Transporting | 18 | Expired |
| US4316277A | Electronic clock movement assembly | Physics | 17 | Expired |
| USD870872S1 | Humidifier | General | 15 | Active |
| US4659233A | Timepiece with built-in timer | Physics | 14 | Expired |
| US6219302A | Time signal repeater and time correction system using the same | Physics | 13 | Expired |
| US5955687A | Disc music box, information disc therefor, and trick timepiece with disc music box | Physics | 13 | Expired |
| US4565955A | Synchronous motor device for timepiece | Electricity | 12 | Expired |
| US4386287A | Synchronous motor for timepiece | Electricity | 12 | Expired |
| USD707136S1 | Clock | General | 12 | Active |
| US4589780A | Means for generating an intermittent alarm sound for a timepiece | Physics | 11 | Expired |
| USD630119S1 | Clock face | General | 11 | Expired |
| US5825721A | Timepiece with music box | Physics | 10 | Expired |
| US4377345A | Alarm signaling circuit for timepiece | Physics | 10 | Expired |
| US4069658A | Alarm setting device for timepieces | Physics | 10 | Expired |
| US4005570A | Leaf-type digital clock | Physics | 9 | Expired |
| US4613236A | Double pendulum clock | Physics | 9 | Expired |
| US4481852A | Sound generating circuit for timepiece | Physics | 8 | Expired |
| USD784165S1 | Clock | General | 8 | Active |
| US4699518A | Musical scale generating circuit | Physics | 8 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.