Patents by Inventor Kuniharu Tatetsuki

Kuniharu Tatetsuki 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).

  • Polarization diversity system suitable for radio communication in indoor space
    Patent number: 5280631
    Abstract: A polarization diversity radio communication system suitable for radio communication in indoor space is provided for transmitting from a transmitter a series of data sequentially from one of two or more transmission antennas of the transmitter, and for reproducing the data received at a receiver through a single reception antenna of the receiver when the series data are received from the transmitter. Thus, the transmitted data from any part of the indoor space can be received efficiently, and a high S/N ratio can be assured on the reception side.
    Type: Grant
    Filed: March 4, 1992
    Date of Patent: January 18, 1994
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Kazuo Nakahi, Hiroshi Umeyama, Shigemi Sakurai, Kuniharu Tatetsuki
  • Antenna and its electronic circuit combination
    Patent number: 4924237
    Abstract: An antenna and its electronic circuit combination is presented to comprise a ground conductor plane 30, a radiating conductor plane 40 disposed in parallel spaced relation to the ground plane 30 and shorted at its one end to the ground plane 30. A ground plane 30 is preferably formed on a printed board 10 which is disposed in parallel relation to the radiating plane 40 to define therebetween an open air space. Mounted on the printed board 10 and received within the open air space are electronic components which form a receiving or transmitting electronic circuit 60 associated with the antenna structure and electrically coupled by means of a feed element 20 to a feed point 44 on the radiating plane 40.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: May 8, 1990
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Kazuhiro Honda, Kouji Yamashita, Masanori Kawai, Kazuo Nakahi, Kuniharu Tatetsuki
  • Photoelectric smoke detector
    Patent number: 4171490
    Abstract: A detection signal processing circuit for photoelectric smoke detectors reliably stable with respect to external noise is provided. Light receiving section of the detector for receiving light emitted intermittently from light emitting section and scattered by smoke particles comprises a light receiving element, a condenser charged depending on intermittent scattered light intensity received by the element and of a value over a predetermined level, and an output circuit providing an output to a following operation means only when charge amount of the condenser has reached a predetermined value. Optimumly, the predetermined value of the condenser charge is achieved when at least two or more of the intermittent scattered light are received continuously.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: October 16, 1979
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Kuniharu Tatetsuki, Tohru Hanahara, Takeshi Nakano, Kazushige Morisue