Patents by Inventor Akitoshi Mochida

Akitoshi Mochida 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).

  • Patent number: 11327296
    Abstract: A light deflector includes a reflector having a reflection plane, a pair of movable parts that support the reflector, a supporting unit configured to support the pair of movable parts, a piezoelectric drive circuit provided for the pair of movable parts, the piezoelectric drive circuit being configured to drive the reflector in response to waveform of driving voltage, and circuitry configured to output two different driving voltages to the piezoelectric drive circuit. Each one of the two different driving voltages has waveform, and the waveform of each one of the two different driving voltages includes, in one cycle, a step-up period where voltage increases, a step-down period where voltage decreases, a first constant-voltage period where voltage is constant after the step-up period and before the step-down period, and a second constant-voltage period where voltage is constant before the step-up period and after the step-down period.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: May 10, 2022
    Assignee: Ricoh Company, Ltd.
    Inventor: Akitoshi Mochida
  • Patent number: 11137595
    Abstract: A light deflection device includes a reflector; a drive beam supporting the reflector such that the reflector is movable; a supporting section supporting the drive beam; and a piezoelectric drive circuit disposed on the drive beam. The light deflection device further includes circuitry configured to output a first drive-voltage waveform and a second drive-voltage waveform to the piezoelectric drive circuit. The first drive-voltage waveform has a period of a positive slope within one cycle, the period of the positive slope includes a period of a first slope and a period of a second slope different from the first slope. The second drive-voltage waveform has a period of a negative slope within one cycle, and the period of the negative slope includes a period of a third slope and a period of a fourth slope different from the third slope.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: October 5, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Akitoshi Mochida, Tomohiko Kamatani
  • Publication number: 20200371345
    Abstract: A light deflector includes a reflector having a reflection plane, a pair of movable parts that support the reflector, a supporting unit configured to support the pair of movable parts, a piezoelectric drive circuit provided for the pair of movable parts, the piezoelectric drive circuit being configured to drive the reflector in response to waveform of driving voltage, and circuitry configured to output two different driving voltages to the piezoelectric drive circuit. Each one of the two different driving voltages has waveform, and the waveform of each one of the two different driving voltages includes, in one cycle, a step-up period where voltage increases, a step-down period where voltage decreases, a first constant-voltage period where voltage is constant after the step-up period and before the step-down period, and a second constant-voltage period where voltage is constant before the step-up period and after the step-down period.
    Type: Application
    Filed: May 12, 2020
    Publication date: November 26, 2020
    Applicant: Ricoh Company, Ltd.
    Inventor: AKITOSHI MOCHIDA
  • Publication number: 20200201028
    Abstract: A light deflection device includes a reflector; a drive beam supporting the reflector such that the reflector is movable; a supporting section supporting the drive beam; and a piezoelectric drive circuit disposed on the drive beam. The light deflection device further includes circuitry configured to output a first drive-voltage waveform and a second drive-voltage waveform to the piezoelectric drive circuit. The first drive-voltage waveform has a period of a positive slope within one cycle, the period of the positive slope includes a period of a first slope and a period of a second slope different from the first slope. The second drive-voltage waveform has a period of a negative slope within one cycle, and the period of the negative slope includes a period of a third slope and a period of a fourth slope different from the third slope.
    Type: Application
    Filed: October 21, 2019
    Publication date: June 25, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: AKITOSHI MOCHIDA, TOMOHIKO KAMATANI
  • Patent number: 5298241
    Abstract: A spirogyra controlling and deodorant composition contains the cortex of Japanese cedar and/or Japanese cypress or an extract thereof. This serves to suppress or prevent the occurrence of spirogyra and maladous odor in water or on moist surface in fish rearing aquarium, pond, marsh, water culture or the like.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: March 29, 1994
    Assignee: Takeda Garden Product Co., Ltd.
    Inventors: Hisashi Obayashi, Yasuhiro Matsumura, Akitoshi Mochida
  • Patent number: 5149534
    Abstract: A spirogyra controlling and deodorant composition contains the cortex of Japanese cedar and/or Japanese cypress or an extract thereof. This serves to suppress or prevent the occurrence of spirogyra and undesirable odor in water or on moist surface in fish rearing aquarium, pond, marsh, water culture or the like.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: September 22, 1992
    Assignee: Takeda Garden Product Co., Ltd.
    Inventors: Hisashi Obayashi, Yasuhiro Matsumura, Akitoshi Mochida