Defu LIU

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Taizhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Straight-pole sun umbrella hand-cranking structure
- Patent number 11,412,821
- Issue date Aug 16, 2022
- Linhai Guokang Leisure Products Co., Ltd.
- Ziguo Wang
- A45 - HAND OR TRAVELLING ARTICLES
Information Patent Grant
Straight-pole sun umbrella hand-cranking device
- Patent number 11,317,688
- Issue date May 3, 2022
- Linhai Guokang Leisure Products Co., Ltd.
- Ziguo Wang
- A45 - HAND OR TRAVELLING ARTICLES

Patents Applicationslast 30 patents

Information Patent Application
SUN UMBRELLA LOCKING DEVICE
- Publication number 20240398078
- Publication date Dec 5, 2024
- Linhai Guokang Leisure Products Co., Ltd.
- Defu LIU
- A45 - HAND OR TRAVELLING ARTICLES
Information Patent Application
SUN UMBRELLA ROD
- Publication number 20240398077
- Publication date Dec 5, 2024
- Linhai Guokang Leisure Products Co., Ltd.
- Defu LIU
- A45 - HAND OR TRAVELLING ARTICLES
Information Patent Application
STRAIGHT-POLE SUN UMBRELLA HAND-CRANKING DEVICE
- Publication number 20210401135
- Publication date Dec 30, 2021
- Linhai Guokang Leisure Products Co., Ltd.
- Ziguo WANG
- A45 - HAND OR TRAVELLING ARTICLES
Information Patent Application
STRAIGHT-POLE SUN UMBRELLA HAND-CRANKING STRUCTURE
- Publication number 20210401134
- Publication date Dec 30, 2021
- Linhai Guokang Leisure Products Co., Ltd.
- Ziguo WANG
- A45 - HAND OR TRAVELLING ARTICLES