Granted Patent
Utility
US 4,470,543 · App. 06/363,659
Rail fastening
Inventors:
Laurence W. Gray, Ronald Jeremy Aitken
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Mar 31, 1982
Inventors
Laurence W. Gray
Ronald Jeremy Aitken
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.