Granted Patent
Utility
US 5,533,695 · App. 08/293,064
Incremental train control system
Inventors:
Robert E. Heggestad, Donald B. Schaefer, Jr.
Patented Case
View Patent ↗
Granted: Jul 9, 1996
Filed: Aug 19, 1994
Inventors
Robert E. Heggestad
Donald B. Schaefer, Jr.
Assignee (at issue)
Harmon Industries, LLC
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.