Granted Patent
Utility
US 4,951,575 · App. 07/363,875
Depressed center beam flat car
Inventors:
Danilo A. Dominguez, James F. Flores
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Jun 9, 1989
Inventors
Danilo A. Dominguez
James F. Flores
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.