Granted Patent
Utility
US 4,330,109 · App. 06/234,229
Heavy duty carriage assembly
Inventors:
William J. Coughlin, David E. Johnson, Kenneth E. McCall
Patented Case
View Patent ↗
Granted: May 18, 1982
Filed: Feb 13, 1981
Inventors
William J. Coughlin
David E. Johnson
Kenneth E. McCall
Assignee (at issue)
Arcair 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.