Granted Patent
Utility
US 6,543,264 · App. 09/918,255
Mortise lockset with internal clutch having override feature
Inventor:
George Frolov
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Jul 30, 2001
Inventor
George Frolov
Assignee (at issue)
Harrow Products LLC
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.