Twist drill | Patent Publication Number 20200094331

US 20200094331 A1

Patent NumberUS 11007583 B2

Application Number16699089

Filled DateNov 28, 2019

Priority DateFeb 14, 2016

Publication DateMar 26, 2020

Original Assignee

Current Assignee

Inventor/ApplicantsHongjia WANG
Hongjia Wang

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