3 patents
Utility
Bicycle Hub Structure
18 Jan 24
A bicycle hub has a hub member and a chain seat.
CHING-SHU CHEN
Filed: 14 Jul 22
Design
Bicycle hub ratchet
25 Jul 23
Ching-Shu Chen
Filed: 12 Jul 21
Utility
Bicycle hub structure
9 Nov 21
A bicycle hub structure has a hub member, a clutch set, a driving base and a sleeve.
Ching-Shu Chen
Filed: 5 Jul 20
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