Granted Patent
Utility
US 6,648,635 · App. 10/051,561
Gas-fired portable unvented infrared heater for recreational and commercial use
Inventors:
Brian S. Vandrak, John D. DuRoss, Jr., Allan L. Haire
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Jan 18, 2002
Inventors
Brian S. Vandrak
John D. DuRoss, Jr.
Allan L. Haire
Assignee (at issue)
Mr. Heater, 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.