Granted Patent
Utility
US 5,590,917 · App. 08/527,659
High security push-to-exit pedestrian door control
Inventors:
Harold L. Brooks, Thomas R. Clark, Kun Hong Kim, James W. Overbey
Patented Case
View Patent ↗
Granted: Jan 7, 1997
Filed: Sep 13, 1995
Inventors
Harold L. Brooks
Thomas R. Clark
Kun Hong Kim
James W. Overbey
Assignees (at issue)
Mas-Hamilton Group, Inc.
N T Monarch Hardware
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.