Granted Patent
Utility
US 5,390,123 · App. 07/896,145
Navigation system with accurate determination of angular velocity
Inventor:
Masataka Ishikawa
Patented Case
View Patent ↗
Granted: Feb 14, 1995
Filed: Jun 9, 1992
Inventor
Masataka Ishikawa
Assignee (at issue)
Zexel Corporation Daihatsu-Nissay
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.