Granted Patent
Utility
US 4,860,809 · App. 07/249,852
Device for and method of producing workpieces with alternating contour mating surfaces
Inventors:
Lawrence M. Cotton, Gery R. Compton
Patented Case
View Patent ↗
Granted: Aug 29, 1989
Filed: Sep 27, 1988
Inventors
Lawrence M. Cotton
Gery R. Compton
Assignee (at issue)
Robert Bosch Power Tool Corporation
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.