Granted Patent
Utility
US 4,912,939 · App. 07/316,848
Making ice in a refrigerator
Inventors:
George Obermann, David W. Troscinski
Patented Case
View Patent ↗
Granted: Apr 3, 1990
Filed: Feb 28, 1989
Inventors
George Obermann
David W. Troscinski
Assignee (at issue)
Eaton 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.