Qin; Ruizan
Patent Applications and Registrations
Patent applications and USPTO patent grants for Qin; Ruizan.The latest application filed is for "rear derailleur having rotation resistance application function and resistance application method".
- Qin; Ruizan - Foshan CN
- Qin; Ruizan - Foshan City CN
| Patent | Date |
|---|---|
| Rear derailleur having rotation resistance function application and resistance application method Grant 11,148,754 - Qin October 19, 2 | 2021-10-19 |
| Rear Derailleur Having Rotation Resistance Application Function and Resistance Application Method App 20200317292 - Qin; Ruizan | 2020-10-08 |
| Bicycle gear shifter Grant 10,435,114 - Qin O | 2019-10-08 |
| Bicycle Gear Shifter App 20190016413 - Qin; Ruizan | 2019-01-17 |
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