Granted Patent
Utility
US 4,226,549 · App. 06/025,328
Locking hinge joint
Inventor:
Richard Batt
Patented Case
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Granted: Oct 7, 1980
Filed: Mar 30, 1979
Inventor
Richard Batt
Assignee (at issue)
Collier-Keyworth Company
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.