Granted Patent
Utility
US 5,267,237 · App. 07/909,921
Collison detection and signaling circuit
Inventor:
Alfred T. Townley
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Jul 7, 1992
Inventor
Alfred T. Townley
Assignee (at issue)
Digital Equipment 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.