Granted Patent
Utility
US 4,771,665 · App. 07/090,762
Blade quality monitor
Inventors:
Donald W. Van Doorn, William D. Beeland
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Aug 28, 1987
Inventors
Donald W. Van Doorn
William D. Beeland
Assignee (at issue)
Lummus 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.