Granted Patent
Utility
US 4,266,273 · App. 06/040,611
System for controlling track-bound vehicles forming a train
Inventors:
Karl U. Dobler, Sigurd Mura, Erhard Kraft
Patented Case
View Patent ↗
Granted: May 5, 1981
Filed: May 21, 1979
Inventors
Karl U. Dobler
Sigurd Mura
Erhard Kraft
Assignee (at issue)
International Standard Electric 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.