Granted Patent
Utility
US 4,236,355 · App. 05/927,321
Precision grinding wheel mount
Inventors:
Douglas J. Hennenfent, Robert A. Johnson, Allan L. Holmstrand
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Jul 24, 1978
Inventors
Douglas J. Hennenfent
Robert A. Johnson
Allan L. Holmstrand
Assignee (at issue)
Control Data 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.