Granted Patent
Utility
US 4,370,921 · App. 06/256,324
Doughnut fryer guide
Inventors:
George O. Moller, Richard L. Twiford
Patented Case
View Patent ↗
Granted: Feb 1, 1983
Filed: Apr 22, 1981
Inventors
George O. Moller
Richard L. Twiford
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.