Granted Patent
Utility
US 4,440,092 · App. 06/229,718
Railway steering truck linear induction motor assembly
Inventor:
George Sobolewski
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: Jan 28, 1981
Inventor
George Sobolewski
Assignee (at issue)
Urban Transportation Development Corp., Ltd.
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.