Patents by Inventor Mareo Sadakata

Mareo Sadakata has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for predicting traffic space mean speed and traffic flow rate, and method and apparatus for controlling isolated traffic light signaling system through predicted traffic flow rate
    Patent number: 5444442
    Abstract: A method for predicting a traffic flow rate at a point on a road to control a traffic light signaling system measures a traffic density on the road to predict a traffic flow rate by utilizing the fact that a velocity of a vehicle on the road is restricted by an interval between successive vehicles, since the traffic density is locally increased when the vehicle interval is not uniform and therefore the spatial mean speed is lowered. This method offers higher accuracy by utilizing a correction coefficient obtained from an actual vehicle distribution, for instance, a coefficient derived from entropy.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: August 22, 1995
    Assignees: Matsushita Electric Industrial Co., Ltd., Tokai University Educational System
    Inventors: Mareo Sadakata, Yoichiro Iwasaki, Yoshiharu Yano, Masakazu Toyama