Granted Patent
Utility
US 4,752,053 · App. 06/624,023
Railway vehicle motion detector
Inventor:
Peter C. Boetzkes
Patented Case
View Patent ↗
Granted: Jun 21, 1988
Filed: Jun 25, 1984
Inventor
Peter C. Boetzkes
Assignee (at issue)
DSL Dynamic Sciences Limited
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.