Granted Patent
Utility
US 4,380,415 · App. 06/191,502
Latch mechanism for walk ramps
Inventors:
Roy C. Higginson, Paul L. Whiteman
Patented Case
View Patent ↗
Granted: Apr 19, 1983
Filed: Sep 29, 1980
Inventors
Roy C. Higginson
Paul L. Whiteman
Assignee (at issue)
Morgan Trailer Mfg. Co.
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.