Granted Patent
Utility
US 4,264,399 · App. 06/089,122
Material braking apparatus
Inventors:
Samuel B. Stevens, Richard W. Kizer
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Jun 26, 1979
Inventors
Samuel B. Stevens
Richard W. Kizer
Assignee (at issue)
Caterpillar Tractor Co.
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.