Patents by Inventor Mituo Oooka

Mituo Oooka 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: 4261048
    Abstract: An analog quartz timepiece having a manually operated external control member, and a correction signal generation circuit controlled by the external control member to generate low speed and high speed correction signals when the external control member is actuated for a short period of time and for a predetermined time interval, respectively, by which a stepping motor is driven at a selected speed to perform time correction. The timepiece also includes a click mechanism operative to shift an hours hand step-wise from any optional position without affecting a minutes hand and a seconds hand. The timepiece further includes a seconds zero-reset mechanism operative to reset the seconds hand to zero.
    Type: Grant
    Filed: June 8, 1979
    Date of Patent: April 7, 1981
    Assignee: Citizen Watch Company Limited
    Inventors: Jinro Motoki, Singo Ichikawa, Kenzi Miyasaka, Hiroyuki Uematsu, Mitsuhiro Murata, Hideyuki Kawashima, Yuri Inoue, Masae Ohkubo, Mituo Oooka
  • Patent number: 4247927
    Abstract: A digital electronic timepiece which comprises an oscillator circuit providing a relatively high frequency signal, a frequency divider dividing down the relatively high frequency signal to provide a first low frequency signal representative of the count of one second and a second low frequency signal higher in frequency than the first low frequency signal and representative of the count less than one second, a first counter responsive to the first low frequency signal to provide time and calendar information signals; and an additional data signal a second counter responsive to the second low frequency signal to provide output signals representative of the count less than one second, first display means for displaying time and calendar data in response to the time and calendar information signals, second display means composed of a plurality of display segments for displaying data representative of the count less than one second in step-wise fashion in response to the output signals from the second counter, sa
    Type: Grant
    Filed: January 5, 1979
    Date of Patent: January 27, 1981
    Assignee: Citizen Watch Company Limited
    Inventors: Mituo Oooka, Makoto Yoshida, Masamichi Yamauchi, Choken Suzuki
  • Patent number: 4173863
    Abstract: An analog quartz timepiece having a manually operated external control member, and a correction signal generation circuit controlled by the external control member to generate low speed and high speed correction signals when the external control member is actuated for a short period of time and for a predetermined time interval, respectively, by which a stepping motor is driven at a selected speed to perform time correction. The timepiece alo includes a click mechanism operative to shift an hours hand step-wise from any optional position without affecting a minutes hand and a seconds hand. The timepiece further includes a seconds zero-reset mechanism operative to reset the seconds hand to zero.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: November 13, 1979
    Assignee: Citizen Watch Company Limited
    Inventors: Jinro Motoki, Singo Ichikawa, Kenzi Miyasaka, Hiroyuki Uematsu, Mitsuhiro Murata, Hideyuki Kawashima, Yuri Inoue, Masae Ohkubo, Mituo Oooka