Granted Patent
Utility
US 5,873,276 · App. 08/704,109
Keypad entry electronic combination lock with self-generated combination
Inventors:
Gerald L. Dawson, Daniel L. Thompson, James D. Hamilton
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Aug 28, 1996
Inventors
Gerald L. Dawson
Daniel L. Thompson
James D. Hamilton
Assignee (at issue)
Mas-Hamilton Group, 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.