Electro-mechanical valve servo apparatus for tool-free retrofit installation | Patent Publication Number 20210180714

US 20210180714 A1
Patent NumberUS 11821537 B2
Application Number17184570
Filled DateFeb 24, 2021
Priority DateSep 20, 2019
Publication DateJun 17, 2021
Original Assignee
Current Assignee
Inventor/ApplicantsChun Kuen Sze
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