Granted Patent
Utility
US 4,248,015 · App. 05/663,548
Multi-pane glazed door defrosting system
Inventors:
Michael E. Stromquist, James J. Heaney
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Mar 3, 1976
Inventors
Michael E. Stromquist
James J. Heaney
Assignee (at issue)
Anthony's Manufacturing Company, 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.