Granted Patent
Utility
US 4,892,677 · App. 06/683,443
Defrost indicator
Inventors:
Anthony F. Preziosi, Thaddeus Prusik, Ray H. Baughman
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Dec 19, 1984
Inventors
Anthony F. Preziosi
Thaddeus Prusik
Ray H. Baughman
Assignee (at issue)
LifeLines Technology, Inc.
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.