Granted Patent
Utility
US 5,771,722 · App. 08/483,277
Dual control mode lock system
Inventors:
Thomas J. DiVito, Edward F. Humphrey
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Jun 7, 1995
Inventors
Thomas J. DiVito
Edward F. Humphrey
Assignee (at issue)
Kaba High Security Locks Corporation
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.