Keys and locks | Patent Publication Number 20210312735
US 20210312735 A1Patent NumberUS 11790711 B2
Application Number17352623
Filled DateJun 21, 2021
Priority DateDec 25, 2014
Publication DateOct 7, 2021
Original Assignee
Current Assignee
Inventor/ApplicantsYaowu MA
Jun MA
George Ma
Qianjia MA
Fen Ruan
Pinzhen Huang
Qianjing Ma
Jun Ma
Qianjing MA
George MA
Pinzhen HUANG
Yaowu Ma
Qianjia Ma
Fen RUAN
Jun MA
George Ma
Qianjia MA
Fen Ruan
Pinzhen Huang
Qianjing Ma
Jun Ma
Qianjing MA
George MA
Pinzhen HUANG
Yaowu Ma
Qianjia Ma
Fen RUAN
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