Granted Patent
Utility
US 5,032,836 · App. 07/541,180
Guiding device for visually handicapped person
Inventors:
Yujiro Ono, Syuichi Nakatome, Yoshihide Kumada, Kenji Suzuki, Junichi Kawamura, Katunori Ota, Satoru Tomiyama
Patented Case
View Patent ↗
Granted: Jul 16, 1991
Filed: Jun 18, 1990
Inventors
Yujiro Ono
Syuichi Nakatome
Yoshihide Kumada
Kenji Suzuki
Junichi Kawamura
Katunori Ota
Satoru Tomiyama
Assignee (at issue)
Namco Ltd.
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.