Granted Patent
Utility
US 4,339,087 · App. 06/184,633
Crusher head supporting unit for a gyratory crusher
Inventor:
Robert J. Pollak
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Sep 8, 1980
Inventor
Robert J. Pollak
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.