Granted Patent
Utility
US 5,810,109 · App. 08/767,926
Electrical switch
Inventor:
Raymond Wai Hang Chu
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: Dec 17, 1996
Inventor
Raymond Wai Hang Chu
Assignee (at issue)
Defond Manufacturing Limited
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.