Granted Patent
Utility
US 4,221,117 · App. 06/004,637
Aerator proportioner for frozen comestible freezers
Inventor:
Tom N. Martineau
Patented Case
View Patent ↗
Granted: Sep 9, 1980
Filed: Jan 19, 1979
Inventor
Tom N. Martineau
Assignee (at issue)
Stoelting, LLC
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.