Patents by Inventor Yoshihiro Kawata

Yoshihiro Kawata 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: 4671913
    Abstract: A process for continuously producing an embossed thermoplastic resin sheet having a colored layer which comprises associating a molten thermoplastic resin A and a molten thermoplastic resin B having a different color from the resin A within a die for extrusion molding, extruding the associated mass through an extrusion opening to form a two-layered thermoplastic resin sheet, and thereafter embossing the sheet, wherein the temperature T (.degree.C.) of the thermoplastic resin sheet immediately before the embossing and the surface roughness R (micrometers) of said sheet immediately before the embossing expressed by a 10-point average roughness in accordance with ISO-R468 are selected so as to satisfy the following relation 1.2R+T.ltoreq.145 (1).
    Type: Grant
    Filed: August 30, 1985
    Date of Patent: June 9, 1987
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Endo Gen, Tatsu Saneharu, Hirokazu Hori, Yoshihiro Kawata
  • Patent number: 4592046
    Abstract: A click tone removing system for a time division switching system which performs switching of speech channels by a highway switch inserted in a highway. When a hook information detector and a dial information detector detect hook information and a dial information, respectively, delivery of a PCM speech sending signal to the highway is prevented by a blocking function for a fixed period of time, so that the highway is controlled to switch the speech channel, thereby removing a click tone generated by dialing.
    Type: Grant
    Filed: April 2, 1984
    Date of Patent: May 27, 1986
    Assignee: Iwasaki Tsushinki Kabushiki Kaisha
    Inventors: Yoshihiro Kawata, Tsunetaka Sakata, Teruo Matsufuji, Tetsuro Inomata, Hiroyuki Miyashita
  • Patent number: 4583214
    Abstract: A transmission system for a key telephone system, in which speech signals and control signals are transmitted through two pairs of transmission conductors between a key service unit and each of a plurality of key telephone sets, and in which DC electric power is supplied from the key service unit to each of a plurality of telephone sets. In accordance with the present invention, the speech signal and the control signal are transmitted through a first transmission line of high frequency band provided by one pair of the transmission conductors from the key telephone set to the key service unit, and the speech signal and the control signal are transmitted through a second transmission line of high frequency band provided by the other pair of the transmission conductors from the key service unit to the key telephone set.
    Type: Grant
    Filed: March 16, 1984
    Date of Patent: April 15, 1986
    Assignee: Iwasaki Tsushinki Kabushiki Kaisha
    Inventors: Hiroyuki Miyashita, Akira Hirato, Yoshihiro Kawata
  • Patent number: 4011546
    Abstract: In display apparatus wherein a picture image corresponding to an information train given by an electronic computer is written in a storage tube by a random scanning system and then the picture image is repeatedly read out of the storage tube by a raster scanning system for displaying it on the screen of a cathode ray tube, means is provided to assure precise correspondence between the information train given by the computer and the position on the screen of the cathode ray tube designated by a light pen thus producing an interruption signal to the computer.
    Type: Grant
    Filed: July 22, 1975
    Date of Patent: March 8, 1977
    Assignee: Iwatsu Electric Co., Ltd.
    Inventors: Yoshihiro Kawata, Kansei Iwata