Patents by Inventor Tamotsu Koyama

Tamotsu Koyama 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: 5656663
    Abstract: An external skin treatment agent composition containing an active ingredient comprising a prostacyclin, and/or its optical isomer, having the formula (I): ##STR1## (wherein, R.sup.1 is a hydrogen atom, a straight chain or branched alkyl group of C.sub.1 to C.sub.10, or one equivalent of a cation, R.sup.2 is a substitutable C.sub.1 to C.sub.10 straight chain or branched alkyl group or substitutable C.sub.1 to C.sub.10 straight chain or branched alkenyl group or alkinyl group, R.sup.3 is a straight chain alkyl group of C.sub.1 to C.sub.5, and R.sup.4 and R.sup.5 are independently a hydroxyl group or formula: ##STR2## (where, R.sup.6 is a C.sub.1 to C.sub.5 straight chain or branched alkyl group)) and a carrier.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: August 12, 1997
    Assignee: Teijin Limited
    Inventors: Atsuo Hazato, Nobuaki Hanajima, Yuji Makino, Toshiaki Takeda, Tamotsu Koyama, Takehisa Hata, Sumihisa Kimura, Saburo Murata
  • Patent number: 5530027
    Abstract: An external skin treatment agent composition containing an active ingredient comprising of a prostacyclin, and/or its optical isomer, having the formula (I): ##STR1## (wherein, R.sup.1 is a hydrogen atom, a straight chain or branched alkyl group of C.sub.1 to C.sub.10, or one equivalent of cations, R.sup.2 is (CH.sub.2).sub.2 R.sup.21 or a substitutable C.sub.3 to C.sub.10 cycloalkyl group, where R.sup.21 is a substitutable C.sub.1 to C.sub.10 straight chain or branched alkyl group or substitutable C.sub.2 to C.sub.10 straight chain or branched alkenyl group or alkynyl group, and R.sup.3 and R.sup.4 are independently a hydroxyl group or formula ##STR2## (wherein, R.sup.5 is a C.sub.1 to C.sub.5 straight chain or branched alkyl group)) and a carrier.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: June 25, 1996
    Assignee: Teijin Limited
    Inventors: Atsuo Hazato, Nobuaki Hanajima, Yuji Makino, Toshiaki Takeda, Tamotsu Koyama
  • Patent number: 5364883
    Abstract: 16(S)-Isocarbacyclins have been found to the useful in the treatment of liver and kidney diseases.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: November 15, 1994
    Assignee: Teijin Limited
    Inventors: Kiyoshi Bannai, Toshio Tanaka, Yoshinori Kato, Tamotsu Koyama, Satoshi Asano, Akira Ohtsu, Seizi Kurozumi, Makoto Ogawa, Yoshio Mori
  • Patent number: 4545647
    Abstract: Compressible interconnection is removably provided between a liquid crystal panel and a circuit board or a semiconductor chip to provide exchangeability for the liquid crystal panel from the viewpoint of the limited operating life inherent in liquid crystal composites. A desired number of electrodes for electrical connection are provided on both the liquid crystal panel and the circuit board to confront each other. The compressible interconnection means comprises a stack including a multiplicity of compressible and resilient conductive regions made of, for example, conductive rubber and a multiplicity of compressible, resilient non-conductive regions made of, for example, rubber in alternate fashion. The conductive regions connect the electrodes provided on the liquid crystal panel with the electrodes provided on the circuit board.
    Type: Grant
    Filed: August 5, 1983
    Date of Patent: October 8, 1985
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takehiko Sasaki, Tamotsu Koyama
  • Patent number: 4468584
    Abstract: In a flexure crystal, flexural vibration will occur when a unidirectional electric field is applied thereto in a manner that strength of the electric field varies from point to point. For the fork type of crystal vibrator, each of branches is provided with electrodes at the top wall, the bottom wall and the outer side wall for application of the strength-variable unidirectional electric field.
    Type: Grant
    Filed: February 9, 1982
    Date of Patent: August 28, 1984
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tutomu Nakamura, Tamotsu Koyama
  • Patent number: 4283650
    Abstract: A ceramic package includes a ceramic case for installing a piezo-vibrator therein. Capacitors are formed directly on the bottom surface of the ceramic case through the multi-layer printing method. Electrodes of the capacitors also function as input and output electrodes for the piezo-vibrator.
    Type: Grant
    Filed: March 16, 1979
    Date of Patent: August 11, 1981
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tamotsu Koyama, Yoshiharu Kuroda
  • Patent number: 4142780
    Abstract: Interconnection is removably provided between a liquid crystal panel and a circuit board or semiconductor chip which provides exchangeability for the liquid crystal panel which is advantageous because of the limited operating life inherent in liquid crystal composites. Contact areas of the circuit chip confront contact areas (or electrode areas) of the liquid crystal panel with interposition of compressible and resilient connector means which complete the circuit therebetween. In one of the preferred embodiments of the present invention, the compressible connector means comprises a rod-like dielectric compressible resilient material such as, for example, rubber and a predetermined number of ring-shaped compressible, reslient electroconductive members such as, for example, conductive rubber. In another preferred form, the electroconductive members comprise discrete stratified conductive members embedded in the rod-like dielectric material in desired alignment with the opposed contact areas.
    Type: Grant
    Filed: March 28, 1975
    Date of Patent: March 6, 1979
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takehiko Sasaki, Tamotsu Koyama