Lei CHENG

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Kunshan City, CN

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Patents Grantslast 30 patents

Information Patent Grant
Frame with an outer silicone layer and a manufacturing method of fo...
- Patent number 11,772,310
- Issue date Oct 3, 2023
- DRAGONSTATE TECHNOLOGY CO., LTD.
- Kuo-Chi Lee
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Injection molding method for a semifinished product
- Patent number 11,389,995
- Issue date Jul 19, 2022
- DRAGONSTATE TECHNOLOGY CO., LTD.
- Kuo-Chi Lee
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Diaphragm for a micro loudspeaker
- Patent number 11,057,708
- Issue date Jul 6, 2021
- Concraft Holding Co., Ltd.
- Lei Cheng
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
EAR PLUG HAVING PRESSURE-ADJUSTING COMPARTMENT AND FORMATION METHOD...
- Publication number 20220038806
- Publication date Feb 3, 2022
- CONCRAFT HOLDING CO., LTD.
- Lei CHENG
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SPRING LEAF AND A MANUFACTURING METHOD OF MAKING THE SPRING LEAF
- Publication number 20210246920
- Publication date Aug 12, 2021
- CONCRAFT HOLDING CO., LTD.
- Kuo-Chi LEE
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
INJECTION MOLDING METHOD FOR A SEMIFINISHED PRODUCT
- Publication number 20210245410
- Publication date Aug 12, 2021
- CONCRAFT HOLDING CO., LTD.
- Kuo-Chi LEE
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
FRAME WITH AN OUTER SILICONE LAYER AND A MANUFACTURING METHOD OF FO...
- Publication number 20210245411
- Publication date Aug 12, 2021
- CONCRAFT HOLDING CO., LTD.
- Kuo-Chi LEE
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
DIAPHRAGM FOR A MICRO LOUDSPEAKER
- Publication number 20210136497
- Publication date May 6, 2021
- CONCRAFT HOLDING CO., LTD.
- Lei CHENG
- H04 - ELECTRIC COMMUNICATION TECHNIQUE