Granted Patent
Utility
US 5,881,589 · App. 08/873,332
Gear driven bolt withdrawal for an electronic combination lock
Inventors:
Thomas R. Clark, Gerald L. Dawson, Walter R. Evans, James P. Redden
Patented Case
View Patent ↗
Granted: Mar 16, 1999
Filed: Jun 12, 1997
Inventors
Thomas R. Clark
Gerald L. Dawson
Walter R. Evans
James P. Redden
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.