Granted Patent
Utility
US 4,315,383 · App. 06/149,347
Inner gear drive for abrading machines
Inventor:
Lawrence Day
Patented Case
View Patent ↗
Granted: Feb 16, 1982
Filed: May 13, 1980
Inventor
Lawrence Day
Assignee (at issue)
Spitfire Tool and Machine Co.
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.