Granted Patent
Utility
US 5,343,400 · App. 07/863,282
Method for detecting relative travel direction of a vehicle
Inventor:
Masataka Ishikawa
Patented Case
View Patent ↗
Granted: Aug 30, 1994
Filed: Jun 19, 1992
Inventor
Masataka Ishikawa
Assignee (at issue)
Zexel GmbH
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.