Granted Patent
Utility
US 5,226,370 · App. 07/858,516
Transit car door system and operation
Inventors:
Frederick E. Templeton, Robert F. Carter, David L. Crawforth
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Mar 27, 1992
Inventors
Frederick E. Templeton
Robert F. Carter
David L. Crawforth
Assignee (at issue)
Morrison-Knudsen 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.