Granted Patent
Utility
US 4,662,270 · App. 06/771,358
Door jamb post and valved vent passage with heater
Inventors:
R. Charles Fiddler, Nathan L. Coleman
Patented Case
View Patent ↗
Granted: May 5, 1987
Filed: Aug 30, 1985
Inventors
R. Charles Fiddler
Nathan L. Coleman
Assignee (at issue)
Kolpak 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.