Granted Patent
Utility
US 4,694,686 · App. 06/832,616
Cutting tool wear monitor
Inventors:
John M. Fildes, Robert H. Krueger
Patented Case
View Patent ↗
Granted: Sep 22, 1987
Filed: Feb 24, 1986
Inventors
John M. Fildes
Robert H. Krueger
Assignee (at issue)
BorgWarner 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.