Granted Patent
Utility
US 5,186,385 · App. 07/807,715
Thermally activated vent damper
Inventors:
Tadeusz Karabin, Frank H. Broome
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Dec 16, 1991
Inventors
Tadeusz Karabin
Frank H. Broome
Assignee (at issue)
Majco Building Specialties, L.P.
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.