Granted Patent
Utility
US 5,099,721 · App. 07/590,167
Steeling apparatus for annular rotary knife blades
Inventors:
Richard B. Decker, Richard P. Bozzi
Patented Case
View Patent ↗
Granted: Mar 31, 1992
Filed: Sep 28, 1990
Inventors
Richard B. Decker
Richard P. Bozzi
Assignee (at issue)
Bettcher Industries, 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.