Granted Patent
Utility
US 4,463,225 · App. 06/428,819
Dryer timer
Inventors:
George Obermann, Erich Kothe, William H. Redfield
Patented Case
View Patent ↗
Granted: Jul 31, 1984
Filed: Sep 30, 1982
Inventors
George Obermann
Erich Kothe
William H. Redfield
Assignee (at issue)
The Singer Company Limited
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.