Patents by Inventor Yoshihiro Yokota

Yoshihiro Yokota 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).

  • Detector having self-calibration function
    Patent number: 5391283
    Abstract: A detector for detecting a physical quantity as a quantity of electricity has a detection portion, a portion for stimulating the detection portion and a signal processing portion, wherein a calibration signal is supplied from the signal processing portion to the detection portion via the stimulating portion so as to measure a specific response of the detection portion, whereby self-calibration and correction of the characteristic of the detector are performed in accordance with an amount of a change in the response.
    Type: Grant
    Filed: December 7, 1992
    Date of Patent: February 21, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Satoshi Shimada, Seiko Suzuki, Shigeki Tsuchitani, Seiichi Ugai, Masayoshi Kaneyasu, Hiroshi Kuroiwa, Yoshihiro Yokota
  • Sensor
    Patent number: 5365768
    Abstract: A signal processor (5) is coupled to a detector (6) for detecting a physical quantity. The signal processor has a zero adjustment memory (14) and a sensitivity adjustment memory (16). The zero adjustment memory and the sensitivity adjustment memory have a number of switches (20, 20A, 20', 20"), respectively. These switches are changed over digitally using a zener zapping method or a polysilicon fuse method at each switch to adjust the characteristics of the detector.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: November 22, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Seiko Suzuki, Kazuo Kato, Masahiro Matsumoto, Shigeki Tsuchitani, Masayuki Miki, Yoshihiro Yokota
  • New aminopiperazine derivatives
    Patent number: 5250528
    Abstract: This invention relates to new aminopiperazine derivatives having the potentiation of the cholinergic activity and represented by the general formula [I]: ##STR1## wherein R.sup.1 is lower alkyl, aryl, ar(lower)alkoxy or a heterocyclic group, each of which may be substituted with halogen,R.sup.2 is hydrogen or lower alkyl,R.sup.3 is cyclo(lower)alkyl, aryl or ar(lower)-alkyl, each of which may be substituted with halogen,A is ##STR2## or lower alkylene, and Y is ##STR3## and pharmaceutically acceptable salts thereof, to processes for the preparation thereof and to a pharmaceutical composition comprising the same.
    Type: Grant
    Filed: October 8, 1992
    Date of Patent: October 5, 1993
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Teruo Oku, Eishiro Todo, Yoshihiro Yokota, Hiroshi Kayakiri, Masashi Hashimoto
  • Capacitive acceleration detector having reduced mass portion
    Patent number: 5228341
    Abstract: Disclosed is an acceleration detector which has an electrically conductive mass portion formed at a free end of a cantilever, and fixed electrodes arranged opposite to the mass portion through a gap so that the value of acceleration is detected on the basis of the change of capacitance between the mass portion and the fixed electrodes, and in which at least one space is formed in the inside of the mass portion to lighten the weight of the mass portion to thereby widen the range of measurement.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: July 20, 1993
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Shigeki Tsuchitani, Seiko Suzuki, Satoshi Shimada, Masayuki Miki, Masahiro Matsumoto, Yoshihiro Yokota, Shotaro Naito
  • Detector having self-calibration function
    Patent number: 5174884
    Abstract: A detector for detecting a physical quantity as a quantity of electricity has a detection portion, a portion for stimulating the detection portion and a signal processing portion, wherein a calibrating signal is supplied from the signal processing portion to the detection portion via the stimulating portion so as to measure a specific response of the detection portion whereby a self-calibration and a correction of the characteristics are performed in accordance with the amount of the change in the response.
    Type: Grant
    Filed: October 10, 1990
    Date of Patent: December 29, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Satoshi Shimada, Seiko Suzuki, Shigeki Tsuchitani, Seiichi Ugai, Masayoshi Kaneyasu, Hiroshi Kuroiwa, Yoshihiro Yokota