Granted Patent
Utility
US 5,353,530 · App. 07/939,331
Quick mounting snow plow assembly
Inventor:
James Calvin Pieper
Patented Case
View Patent ↗
Granted: Oct 11, 1994
Filed: Sep 2, 1992
Inventor
James Calvin Pieper
Assignee (at issue)
Douglas Dynamics, L.L.C.
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.