Granted Patent
Utility
US 4,248,335 · App. 06/006,344
Key-operated actuator
Inventors:
Richard Cornelius, Richard LaReau
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Jan 25, 1979
Inventors
Richard Cornelius
Richard LaReau
Assignee (at issue)
McQuay-Perfex 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.