Granted Patent
Utility
US 5,137,220 · App. 07/821,856
Mounting apparatus for impeller for a centrifugal impact crusher
Inventors:
Brett Rose, William F. Burr, Stephen B. Ackers
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Jan 15, 1992
Inventors
Brett Rose
William F. Burr
Stephen B. Ackers
Assignee (at issue)
Canica Crushers, Inc.
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.