Granted Patent
Utility
US 5,545,878 · App. 08/337,997
Defrost heater with spiral vent
Inventors:
William C. Jasper, II, Cheryl S. Middleton, Ronald G. Prusinski
Patented Case
View Patent ↗
Granted: Aug 13, 1996
Filed: Nov 10, 1994
Inventors
William C. Jasper, II
Cheryl S. Middleton
Ronald G. Prusinski
Assignee (at issue)
Wirekraft Industries, 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.