US Patent 11662065 Manufacturing method of LED filament and manufacturing method of bulb

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Patent Number

Date of Patent

May 30, 2023

Patent Application Number

178060010

Date Filed

June 8, 2022

Patent Citations Received

Patent Primary Examiner

CPC Code

A manufacturing method of an LED filament and a manufacturing method of a bulb are provided. The steps are as follows: step S

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