Granted Patent
Utility
US 4,697,541 · App. 06/423,621
Crossing control arm for vehicles
Inventor:
James H. Wicker
Patented Case
View Patent ↗
Granted: Oct 6, 1987
Filed: Sep 27, 1982
Inventor
James H. Wicker
Assignee (at issue)
Specialty Manufacturing, 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.