Granted Patent
Utility
US 4,410,143 · App. 06/190,918
Main shaft assembly for a gyratory crusher
Inventor:
Donald J. Polinski
Patented Case
View Patent ↗
Granted: Oct 18, 1983
Filed: Sep 26, 1980
Inventor
Donald J. Polinski
Assignee (at issue)
Allis-Chalmers Corporation
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.