Granted Patent
Utility
US 4,551,982 · App. 06/670,014
Ice-thickness sensing device in refrigeration system
Inventors:
Erich J. Kocher, John K. Kopp
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Nov 13, 1984
Inventors
Erich J. Kocher
John K. Kopp
Assignee (at issue)
Vilter Manufacturing 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.