Granted Patent
Utility
US 4,443,187 · App. 06/384,868
Portable heater with integrated control system
Inventors:
Robert S. Shaftner, Norman D. Chambers, Michael Kagan, Eugene C. Briggs
Patented Case
View Patent ↗
Granted: Apr 17, 1984
Filed: Jun 4, 1982
Inventors
Robert S. Shaftner
Norman D. Chambers
Michael Kagan
Eugene C. Briggs
Assignee (at issue)
Koehring Company
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.