Patents by Inventor Akihiro Ishiwata

Akihiro Ishiwata 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: 6790964
    Abstract: The present invention provides a method of producing 7-azabicyclo[4.1.0]hept-3-ene-3-carboxylic acid ester (VII) economically, industrially advantageously and efficiently in a large amount.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: September 14, 2004
    Assignees: Sagami Chemical Research Center, Kuraray Co., Ltd.
    Inventors: Shiro Terashima, Katsuji Ujita, Akihiro Ishiwata
  • Patent number: 6392059
    Abstract: Intermediates for the preparation of himbacine exhibiting muscarinic M2 receptor antagonism, which are hydronaphtho[2,3-c]furan derivatives represented by general formula (1) or intermediates for the preparation thereof: wherein R1 is lower alkyl or aralky; R2 is hydrogen, lower alkyl or aralkyl; R3 and R4 together represent oxygen or methylene, or alternatively R4 is hydroxyl, lower alkoxy, aralkyloxy or lower acyloxy, with R3 being hydrogen; R5 and R6 together represent oxygen, or alternatively R6 is hydroxyl, lower alkxy, aralkyloxy or lower acyloxy, with R5 being hydrogen; and either of the broken lines is a single bond and the other thereof is a double bond, or alternatively both are single bonds.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: May 21, 2002
    Assignees: Sagami Chemical Reasearch Center, Kyorin Pharmaceutical Co., Ltd.
    Inventors: Shiro Terashima, Masanori Takadoi, Akihiro Ishiwata, Tadashi Katoh
  • Patent number: 5615106
    Abstract: In a control device, comprising a plurality of base components connected to one another in series by a composite signal line including a plurality of address signal lines, a control unit fitted onto one of said base components, and a plurality of controlled units adapted to be controlled by said control unit and each fitted onto a selected different one of the remaining base components, the control unit selects one of the address signal lines in the composite signal line, and produces an address signal thereon. The base components associated with the controlled units are provided with respective terminators each corresponding to one of the address signal lines, and these terminators are connected to the corresponding controlled units while the remaining address signal lines are simply passed on. Thereby, the addresses of controlled units are allowed to be automatically set up by the control unit.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: March 25, 1997
    Assignee: RKC Instrument, Inc.
    Inventors: Tooru Yoshino, Akihiro Ishiwata, Eiji Miyamura