Granted Patent
Utility
US 6,759,608 · App. 10/209,928
Electrical switch
Inventor:
Raymond Wai Hang Chu
Patented Case
View Patent ↗
Granted: Jul 6, 2004
Filed: Aug 2, 2002
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.