Granted Patent
Utility
US 4,553,009 · App. 06/553,966
Keyboard switch with pivotal actuator lever
Inventors:
Anthony J. Van Zeeland, Ronald S. Denley
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Nov 21, 1983
Inventors
Anthony J. Van Zeeland
Ronald S. Denley
Assignee (at issue)
Oak Industries 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.