Patents by Inventor Seiko Ishikawa

Seiko Ishikawa 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: 10496221
    Abstract: A position detection device for detecting positions of a non-emitter and an emitter in a detection area includes one or more reflective members disposed around the detection area, illumination light sources to emit light toward the reflective member, light receiving sensors to receive light from the reflective member and light from the light emitter, and a control device to control the illumination light sources and the light emitter. Based on previous detection statuses of the non-light emitter and the light emitter, the control device sets a time ratio of a time of a non-light emitter detection mode to a time of a light emitter detection mode, and sets timings of the non-light emitter detection mode and the light emitter detection mode.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: December 3, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yoshiaki Oshima, Noritada Ohi, Katsuyuki Omura, Masafumi Nagao, Naoyuki Ishikawa, Seiko Yamamoto, Masanobu Yamagata
  • Patent number: 5654690
    Abstract: Disclosed is an improved fire alarm system for an information providing system having a plurality of terminal devices for providing information to a plurality of operators, respectively. The fire alarm system is provided with a fire detecting sensors. If a fire is detected, a predetermined signal is transmitted to a controller. The controller controls each of the plurality of terminal devices to indicate an alarm information to the operator when the predetermined signal is received.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: August 5, 1997
    Assignees: Brother Kogyo Kabushiki Kaisha, Xing Inc., Intec Inc.
    Inventors: Seiko Ishikawa, Takayoshi Urano, Kazunori Ikami, Yoshihiko Hibino, Masaru Yasuda, Yasuhiro Funahashi, Naomi Moriguchi, Hiroshi Matsuhashi, Tatsuo Matsuda, Kazuhiro Fujii
  • Patent number: 4991135
    Abstract: An electronic dictionary comprising an input device, a display, a dictionary memory, a searching device, and an indicator device. The memory consists of plural divisions of equal storage capacity and stores multiple sets of word data representative of different words in an alphabetical order. Each set of word data is stored in one of the plural divisions such that each of the divisions has at its end a waste portion storing no part of any of the multiple sets of word data, if the number of characters of the first set of word data stored in the following division is larger than the number of characters which may be stored in the waste portion.
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: February 5, 1991
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Motokazu Yoshimura, Tsuyoshi Nishibu, Seiko Ishikawa
  • Patent number: 4747053
    Abstract: An electronic dictionary in which a plurality of word data each representing an English word are stored in a predetermined order and each word data comprises a data division and an additional division. Each data division includes a combination of one or more parts among a first compressed part, a second compressed part and a third compressed part; the first compressed part being a code indicating the number of first characters that are common between an English word represented by the corresponding word data and the English word whose corresponding word data is stored just before the word data in the electronic dictionary; the second compressed part being a code indicating a suffix which appears in English words, and the third compressed part being a sequence of codes each representing each alphanumerical character not represented by a first or second part code.
    Type: Grant
    Filed: May 16, 1986
    Date of Patent: May 24, 1988
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Motokazu Yoshimura, Tsuyoshi Nishibu, Seiko Ishikawa