Granted Patent
Utility
US 4,291,502 · App. 06/078,520
Grinding or polishing tool
Inventors:
Emerson A. Grimsby, Stanley W. Levasheff
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Sep 24, 1979
Inventors
Emerson A. Grimsby
Stanley W. Levasheff
Assignee (at issue)
International Telephone and Telegraph 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.