Granted Patent
Utility
US 6,000,254 · App. 09/052,622
Door lock combination chambers
Inventor:
Paul Raybary
Patented Case
View Patent ↗
Granted: Dec 14, 1999
Filed: Mar 31, 1998
Inventor
Paul Raybary
Assignee (at issue)
Ilco Unican Inc.
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.