Granted Patent
Utility
US 6,542,811 · App. 10/013,657
Walker navigation system, walker navigation method, guidance data collection apparatus and guidance data collection method
Inventor:
Miwako Doi
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Dec 13, 2001
Inventor
Miwako Doi
Assignee (at issue)
Kabushiki Kaisha Toshiba
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.