Granted Patent
Utility
US 4,386,469 · App. 06/270,943
Railroad car wheel gauge
Inventor:
Irving Lapsker
Patented Case
View Patent ↗
Granted: Jun 7, 1983
Filed: Jun 5, 1981
Inventor
Irving Lapsker
Assignee (at issue)
Abex Corporation
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.