Granted Patent
Utility
US 4,900,944 · App. 07/257,645
Booster unit for diesel electric locomotive
Inventor:
Frank Wegner Donnelly
Patented Case
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Granted: Feb 13, 1990
Filed: Oct 14, 1988
Inventor
Frank Wegner Donnelly
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.