Patents by Inventor Akihisa Yokoyama

Akihisa Yokoyama 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).

  • Publication number: 20080043746
    Abstract: To provide a signal processing section of a software radio device or the like which can dynamically change connection itself of an internal function structure at the time of execution. A switching module ISM1(2) or the like selects and uses one of the plurality of the routing tables (60) or the like prepared according to the signal processing and executes routing control to respective processing modules a11 or the like based on the input data packet. The processing module a11 or the like executes each processing by using a parameter table or the like indicating the processing to be performed in accordance with the data packet.
    Type: Application
    Filed: June 3, 2005
    Publication date: February 21, 2008
    Applicant: TOYOTA INFOTECHNOLOGY CENTER CO., LTD.
    Inventors: Akihisa Yokoyama, Hiroshi Harada, Hitoshi Inoue, Makoto Honda
  • Patent number: 6310070
    Abstract: A novel purine derivative exhibiting an effect to control inflammatory symptoms characteristic to nephritis and a medicine comprising this compound as an effective ingredient are provided. The compound is represented by the following general formula (I), wherein R1 is a hydrocarbon group having 17 or less carbon atoms and R2 is a hydrocarbon group having 16 or less carbon atoms, wherein one or more CH2 g roups in the hydrocarbon group which 7013 do not directly bind with the carbon atom at 2 or 7 position of the purine ring replaced are by carbonyl groups, sulfonyl groups, O, or S and/or one or more CH groups in the hydrocarbon group which do not directly bind with the carbon atom at 2 or 7 position of the purine ring are replaced by N, C-halogen, or C—C≡N, or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: October 30, 2001
    Assignee: Japan Energy Corporation
    Inventors: Akihisa Yokoyama, Sumitsugu Kisanuki, Yoshikazu Matsuda, Junko Matsui, Yoshiaki Isobe
  • Patent number: 5612339
    Abstract: 2-Hydroxy-3-aminopropylsulfonamides are provided along with methods for synthesizing and using such compounds, and chemical intermediates employed in the synthetic methods.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: March 18, 1997
    Assignee: Trustees Of The University Of Pennsylvania
    Inventors: Paul Sprengeler, Amos B. Smith, III, Ralph F. Hirschmann, Akihisa Yokoyama
  • Patent number: 5519060
    Abstract: Methods are provided for using 2-hydroxy-3-aminopropylsulfonamides to mimic peptides and to modulate the chemical and/or biological activity of enzymes, particularly proteolytic enzymes. Also provided are compositions comprising the sulfonamides in admixture with a pharmaceutically acceptable carrier, adjuvant, or vehicle.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: May 21, 1996
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Paul Sprengeler, Amos B. Smith, III, Ralph F. Hirschmann, Akihisa Yokoyama
  • Patent number: 5137653
    Abstract: This invention provides a novel alkanoyl ester compound represented by general formula (I): ##STR1## (wherein A is of --, --O--, ##STR2## B is ##STR3## l and m are 1 or 2 provided that both are not simultaneously 2, k and n are an integer of 1 or more, respectively, provided that k>n, and R is an alkyl group), a liquid crystal composition containing this compound, a novel alkanoylphenyl compound or a novel alkanoylbiphenyl compound as an intermediate for the production of the above compound, and a method of producing the same. These novel alkanoyl ester compounds are excellent in the stability against light and the like and can take a liquid crystal state at a wide temperature range. Particularly, these compounds form liquid crystals of ferroelectricity having a large spontaneous polarization and a fast response rate by introducing an optically active group into the compound, so that they develop a very excellent effect as a starting material for optoelectronics and its related elements.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: August 11, 1992
    Assignee: Nippon Mining Co., Ltd.
    Inventors: Toshihiro Hirai, Atsushi Yoshizawa, Isa Nishiyama, Mitsuo Fukumasa, Nobuyuki Shiratori, Akihisa Yokoyama
  • Patent number: 5098602
    Abstract: This invention provides a novel halogen-containing ester compound represented by the following general formula (I): ##STR1## (wherein R is an alkyl group, A is selected from a single bond, --O--, --COO-- and --CO--, both of X and Y are halogen atoms or either one of X and Y is a halogen atom and the other is a hydrogen atom, each of m and n is 0 or 1, m+n=0 or 1, each of k and l is an integer of 1 or more, provide k<l), a liquid crystal composition and a light switching element each containing the above compound as well as a novel fluorophenol compound represented by the following general formula (II): ##STR2## (wherein each of k and l is an integer of 1 or more, provided k<l) as an intermediate for the synthesis of the above ester compound and a method of producing the same.
    Type: Grant
    Filed: May 2, 1989
    Date of Patent: March 24, 1992
    Assignee: Nippon Mining Co., Ltd.
    Inventors: Toshihiro Hirai, Atsushi Yoshizawa, Isa Nishiyama, Mitsuo Fukumasa, Nobuyuki Shiratori, Akihisa Yokoyama
  • Patent number: 4970023
    Abstract: This invention provides novel biphenyl compounds represented by the following general formula (I): ##STR1## (wherein R is an alkyl group, A is selected from the single bond, --COO--, --OCO--, --OCOO-- and --CO--, and each of m and n is an integer of 1 or more, provided m<n), optically active bodies thereof, liquid crystal compositions containing at least one of these compounds, light switching elements comprising at least one of the above compounds as a constituent element, and a method of producing the compound.
    Type: Grant
    Filed: May 9, 1989
    Date of Patent: November 13, 1990
    Assignee: Nippon Mining Co., Ltd.
    Inventors: Toshihiro Hirai, Atsushi Yoshizawa, Isa Nishiyama, Mitsuo Fukumasa, Nobuyuki Shiratori, Akihisa Yokoyama