Granted Patent
Utility
US 6,274,828 · App. 09/507,452
On-off switch with off position locking actuator
Inventor:
Raymond Wai Hang Chu
Patented Case
View Patent ↗
Granted: Aug 14, 2001
Filed: Feb 22, 2000
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.