1
Wu Chou, Biing Hwang Juang, Tatsuya Kawahara, Chin Hui Lee: Method of key-phase detection and verification for flexible speech understanding. Lucent Technologies, Kenneth M Brown, August 18, 1998: US05797123 (165 worldwide citation)

A key-phrase detection and verification method that can be advantageously used to realize understanding of flexible (i.e., unconstrained) speech. A "multiple pass" procedure is applied to a spoken utterance comprising a sequence of words (i.e., a "sentence"). First, a plurality of key-phrases are de ...


2
Shoichiro Nitta, Masayoshi Taki, Tatsuya Kawahara, Morimichi Miura: Fuel-cells system. Toyota Jidosha Kabushiki Kaisha, Oblon Spivak McClelland Maier & Neustadt P C, August 22, 2000: US06106963 (23 worldwide citation)

A fuel-cells system 20 is equipped with an oxygen enrichment unit 34 and supplies air whose oxygen partial pressure has been increased by the oxygen enrichment unit 34 to fuel cells 40 as oxidizing gas. The oxygen enrichment unit 34 is a magnetic oxygen enrichment device that effects oxygen enrichme ...


3
Tatsuya Kawahara: Electrode for fuel cell and method of manufacturing electrode for fuel cell. Toyota Jidosha Kabushiki Kaisha, Kenyon & Kenyon, January 18, 2000: US06015635 (14 worldwide citation)

In a catalyst electrode 23, a plurality of catalyst clusters 30 and a plurality of electrolyte clusters 32 are connected and entwined with each other. Each catalyst cluster 30 is formed by aggregation of a plurality of carbon particles 36 with a catalyst 34 carried thereon, and the surface of the ca ...


4
Tatsuya Kawahara, Katsuhiko Kinoshita, Yoshitaka Kino, Toshiaki Ozaki: Fuel cell. Toyota Jidosha Kabushiki Kaisha, Kenyon & Kenyon, August 23, 2005: US06933067 (9 worldwide citation)

A polymer electrolyte fuel cell includes an electrode including a catalyst layer and a diffusion layer. The catalyst layer is divided into a plurality of portions including an upstream portion and a downstream portion along a reactant gas flow direction. The upstream portion of the catalyst layer ha ...


5
Tatsuya Kawahara: Method of manufacturing electrode or electrode-electrolyte membrane joint body for fuel cell and electrode for fuel cell. Toyota Jidosha Kabushiki Kaisha, Oblon Spivak McClelland Maier & Neustadt P C, November 25, 2003: US06653252 (9 worldwide citation)

A paste-like ink is prepared by dissolving camphor in an alcoholic solvent and dispersing fine carbon particles with a catalyst carried thereon in the solvent (step S


6
Tatsuya Kawahara: Fuel cell. Toyota Jidosha Kabushiki Kaisha, Kenyon & Kenyon, May 11, 2004: US06733911 (9 worldwide citation)

A polymer electrolyte fuel cell includes a high-temperature portion and a low-temperature portion in a cell plane. The fuel cell includes an oxidant gas passage where an oxidant gas flows. An oxidant gas flow is directed from the high-temperature portion to the low-temperature portion of the cell so ...


7
Masayoshi Taki, Seiji Mizuno, Toshiaki Ozaki, Tatsuya Kawahara, Katsuhiko Kinoshita, Yoshimasa Negishi: Fuel reformer device. Toyota Jidosha Kabushiki Kaisha, Oliff & Berridge, May 3, 2005: US06887286 (8 worldwide citation)

The present invention is directed to a fuel reformer device that produces a hydrogen rich gas from a hydrocarbon and steam. The steam reforming reaction that produces the hydrogen rich gas from the hydrocarbon and steam is endothermic. A known technique supplies heat required for the steam reforming ...


8
Toshiaki Ozaki, Tatsuya Kawahara: Electrode for fuel cell and a method for producing the electrode. Toyota Jidosha Kabushiki Kaisha, Oliff & Berridge, August 28, 2001: US06280872 (7 worldwide citation)

Two electrodes contact an electrolyte membrane on both sides of the electrolyte membrane and each electrode contacts each separator on the other side of the electrode. An electrochemical fuel cell comprises a plurality of unit cells which comprise the electrolyte membrane, the electrode, and the sep ...


9
Seiji Mizuno, Tatsuya Kawahara: Fuel cell electrode catalyst solution and production method therefor. Toyota Jidosha Kabushiki Kaisha, Kenyon & Kenyon, July 8, 2003: US06589685 (5 worldwide citation)

The invention improves operability in forming a catalyst electrode, and improves performance of a fuel cell. A catalyst-loaded carbon is dispersed in a mixed solution of an azeotropic solvent and ion exchanged water. An electrolyte solution is added to the dispersed solution. A solvent, such as etha ...


10
Hisao Kato, Tatsuya Kawahara, Toshiaki Ozaki: DEVICE AND METHOD FOR EVALUATING PERFORMANCE OF FUEL CELLS, DEVICE AND METHOD FOR EVALUATING SPECIFIC SURFACE AREA OF FUEL-CELL ELECTRODE CATALYSTS, FUEL-CELL ELECTRODE CATALYST, AND METHOD OF MANUFACTURING THE SAME. Toyota Jidosha Kabushiki Kaisha, Kenyon & Kenyon, March 30, 2004: US06713020 (5 worldwide citation)

A device and a method for simply and accurately evaluating performance of fuel cells have been provided. Hydrogen gas and carbon monoxide gas are caused to flow into a sample holder where an electrode catalyst sample is laid, and the amount of carbon monoxide gas discharged therefrom is detected. Th ...