Granted Patent
Utility
US 4,375,857 · App. 06/157,550
Automatic railway controlled buffer coupling
Inventors:
Wilhelm Gunther, Hilmar Forster
Patented Case
View Patent ↗
Granted: Mar 8, 1983
Filed: Jun 9, 1980
Inventors
Wilhelm Gunther
Hilmar Forster
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.