Patents by Inventor Mareo Suto

Mareo Suto 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).

  • Tablet type coordinate input apparatus using elastic wave
    Patent number: 4665282
    Abstract: A tablet type coordinate input apparatus comprises a flat medium for propagating a longitudinal elastic wave, longitudinal elastic wave detecting elements disposed on part of the end-adjacent side surfaces or of the front surface of the flat medium, a longitudinal elastic wave input member having an end portion terminating in a sharp-pointed end and brought into pressure engagement at that end with any desired position on the surface of the flat medium to radiate the longitudinal elastic wave from that end, an amplifier circuit amplifying electrical signals indicative of the elastic wave detected by the detecting elements, a comparator circuit comparing the signals amplified by the amplifier circuit with a predetermined threshold voltage thereby generating delay pulse signals corresponding to the propagation times of the longitudinal elastic wave, a counter circuit counting the lengths of time elapsed from the time of radiation of the longitudinal elastic wave toward the flat medium as a result of pressure en
    Type: Grant
    Filed: July 24, 1985
    Date of Patent: May 12, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Ichiya Sato, Takao Yoneyama, Masanori Tanabe, Kanji Kawakami, Hisao Okada, Soji Sasaki, Shigeru Inose, Mareo Suto, Hideo Uzuhashi