Granted Patent
Utility
US 4,201,016 · App. 05/886,996
Apparatus for grinding a workpiece
Inventors:
Calvin K. Kirk, Glover C. Joyce, Francis L. Messier
Patented Case
View Patent ↗
Granted: May 6, 1980
Filed: Mar 16, 1978
Inventors
Calvin K. Kirk
Glover C. Joyce
Francis L. Messier
Assignee (at issue)
Warner & Swasey
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.