Granted Patent
Utility
US 6,516,644 · App. 09/361,071
Method of master keying a system of locks
Inventor:
Lloyd Seliber
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Jul 26, 1999
Inventor
Lloyd Seliber
Assignee (at issue)
Schlage Lock Company 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.