Granted Patent
Utility
US 4,372,075 · App. 06/245,866
Apparatus for coupling and uncoupling toy tractors and semitrailers
Inventor:
Samuel J. Harkins
Patented Case
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Granted: Feb 8, 1983
Filed: Mar 20, 1981
Inventor
Samuel J. Harkins
Assignee (at issue)
Tyco 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.