Granted Patent
Utility
US 4,916,902 · App. 07/086,135
Ambient air modulator for engine fluid heat exchanger
Inventors:
Howard L. Pratt, Robert J. Selzer
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Aug 17, 1987
Inventors
Howard L. Pratt
Robert J. Selzer
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.