Patents by Inventor Haruo Yamada

Haruo Yamada 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: 5603090
    Abstract: A method for tracking, in a roaming receiver, RF channels in a multi-area system where each area has a unique RF channel and each unique RF channel has a unique address for each user. A plurality of telephone area codes are stored into a memory of the receiver with each of the telephone area codes corresponding to a different RF channel within the multi-area system. An address from the RF channel which is unique to the receiver for that specific RF channel is received by the receiver, each address corresponding to one of the stored telephone area codes. A telephone area code corresponding to the address is then retrieved from the receiver memory, and the telephone area code is displayed in a receiver display to allow a user to quickly recognize which area of the multi-area system the receiver is located within.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: February 11, 1997
    Assignee: Motorola, Inc.
    Inventors: Tuan K. Nguyen, Haruo Yamada, Kazuyuki Mori, Hiroshi Takahashi, Asao Hirano
  • Patent number: 5480899
    Abstract: An oxazolidine derivative represented by the formula (I) ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are H, optionally halogenated alkyl, optionally halogenated alkoxy, OH, halo, NO.sub.2, amino optionally having acetyl or alkyl, COOH, alkoxycarbonyl, CN, alkanoyl, 2-oxazolyl, or R.sup.1 and R.sup.2 may be combined with each other to represent --(CH.sub.2).sub.p -- or --O(CH.sub.2).sub.q O-- (p is 3-5, q is 1-3) to form a ring, m and n are each 0 or 1, R.sup.4 and R.sup.5 are H or alkyl, X is C or N, Y is CH.sub.2 OH, CHO or COOR.sup.6 (R.sup.6 is alkyl, benzyl or H), A is alkylene, carbonyl or sulfonyl, B is alkylene, E is alkylene which may be substituted with halo or is alkenylene, Z is O or S, except for a compound wherein n is 0, m is 1 and Y is CH.sub.2 OH, and except for a compound wherein n is 0, Y is COOR.sup.6 (R.sup.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: January 2, 1996
    Assignee: Taiho Pharmaceutical Co., Ltd.
    Inventors: Shingo Yano, Tomoyasu Ohno, Kazuo Ogawa, Haruo Yamada, Tetsuhiko Shirasaka, Hiroyuki Kawamura, Shinichi Watanabe
  • Patent number: 4835209
    Abstract: The present invention relates to a rubber-like polybutadiene or a rubber-like butadiene-styrene copolymer suited for use in tire treads which are obtained by polymerization of the monomer(s) in the presence of an organolithium catalyst, followed by reacting a carbodiimide with the reactant product thereof so as to subject it to reaction at its living point, and if necessary, further reacting the product thus obtained with a trifunctional or higher-order coupling agent. The invention further relates to a process for the production thereof, and a rubber composition containing more than a definite amount of said polymer.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: May 30, 1989
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yuichi Kitagawa, Haruo Yamada, Akira Saito
  • Patent number: 4772681
    Abstract: Novel porphyrin derivatives of the general formula: ##STR1## wherein R.sub.1 each independently denotes a hydrogen, a C.sub.1 -C.sub.4 alkyl group or an ethenyl group, and R.sub.2 each independently denotes COZ(C.sub.m H.sub.2m)Q, COZCH(C.sub.m H.sub.2m Q).sub.2, --CH.sub.2 --Q [wherein Z is O, S or NH, m is an integer of 1 to 23, and Q is a di-(C.sub.1 -C.sub.4 alkyl)amino group or tri-(C.sub.1 -C.sub.4 alkyl)ammonium halide group] or ##STR2## (wherein X is a halogen); or R.sub.1 each independently denotes --C.sub.2 H.sub.4 --Q (wherein Q is the same as defined above), ##STR3## (wherein X is the same as defined above), and R.sub.2 each independently denotes a carboxyl group or a C.sub.1 -C.sub.4 alkoxycarbonyl group, and the production thereof are described. The quarternary ammonium salt type of the above compounds exhibit affinity and photosensitizing activity for cancer cells and can be employed for diagnosing and treating cancer under irradiation of laser light.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: September 20, 1988
    Assignee: Hamari Chemicals, Ltd.
    Inventors: Yozo Fukuda, Takuzo Otani, Haruo Yamada, Michikazu Sawada, Katsuo Aizawa, Mari Uchimoto, Michito Karasawa
  • Patent number: 4657076
    Abstract: A mounting structure for chemical injection tube for a geothermal well which is used to generate power from geothermal energy is provided. A chemical injection tube is wound spirally along the outer surface of a vertical pipe. A double structure of a casing pipe of the geothermal well including the injection tube, which is inserted between the pipes, extends deep in the well below, the flashing point of the well. A plug is inserted at the lower end of the tube. The plug is removed by compressed air or water prior to the injection of scale inhibiting chemicals from the top of the tube. Thus, the chemical injection tube protects the well from the deposition of carbonate scale thereby providing a stable power plant operation.
    Type: Grant
    Filed: February 27, 1985
    Date of Patent: April 14, 1987
    Assignee: Japan Metals and Chemicals Co., Ltd.
    Inventors: Jiro Tsutsumi, Minolu Uchiyama, Kunio Katagiri, Haruo Yamada
  • Patent number: 4480606
    Abstract: An internal combustion engine having a helically-shaped intake port. When the intake manifold vacuum is in the range of about -500 through -250 mmHg, a super lean mixture is fed into the cylinders of the engine. When the intake manifold vacuum is in the range of about -250 through -100 mmHg, a fuel mixture, having the stoichiometric air-fuel ratio, is fed into the cylinders of the engine. When the intake manifold vacuum is smaller than about -100 mmHg, a rich mixture is fed into the cylinders of the engine.
    Type: Grant
    Filed: October 12, 1982
    Date of Patent: November 6, 1984
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinichi Kato, Katsuhiko Motosugi, Masatami Takimoto, Haruo Yamada, Kisaburo Mizuno, Mitsuyoshi Teramura