Patents by Inventor Toru Oishi

Toru Oishi 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).

  • Composition containing calcium carbonate particles dispersed in sulfur for removing nitrate nitrogen
    Patent number: 7109022
    Abstract: This invention relates to a denitrifying composition which is a material to be used for decomposing nitrates nitrogen in effluent by sulfur-oxidizing bacteria that consume sulfur and carbonate as nutrients and is characterized by containing particles of calcium carbonate dispersed in sulfur. Preferably, the composition contains 10 parts by weight of sulfur coexisting with 10-15 parts by weight of calcium carbonate and 1-3 parts by weight of a microporous substance. This denitrifying composition can be prepared by heating powder of calcium carbonate and sulfur thereby melting the sulfur, dispersing the powder of calcium carbonate in liquid sulfur and solidifying the dispersion by rapid cooling. The composition simultaneously contains nutrients and alkali source and hence enables denitrification to proceed stably without addition of other components.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: September 19, 2006
    Assignees: Nitchitsu Co., Ltd, Nippon Steel Chemical Co., Ltd.
    Inventors: Atsushi Yatagai, Tomomichi Gunji, Hiroshi Masujima, Takuma Yabe, Toru Oishi
  • Voice decoder, voice decoding method and program for decoding voice signals
    Patent number: 7047186
    Abstract: A voice decoder comprises the first voice decoding circuit which is specialized for decoding narrow band voice signal, the second voice decoding circuit which is specialized for decoding wide band voice signals, and a band determination circuit which determines whether a target signal to be decoded is a narrow band voice signal or wide band voice signal. The band determination circuit supplies the first voice decoding circuit with the target signal in a case where it is determined that the target signal is a narrow band voice signal, and supplies the second voice decoding circuit with the target signal in a case where it is determined that the target signal is a wide band voice signal. The first voiced decoding circuit decodes the supplied target signal. The second voice decoding circuit decodes the supplied target signal.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: May 16, 2006
    Assignee: NEC Electronics Corporation
    Inventor: Toru Oishi
  • Composition containing calcium carbonate particles dispersed in sulfur for removing nitrate nitrogen
    Patent number: 6734011
    Abstract: This invention relates to a denitrifying composition which is a material to be used for decomposing nitrates nitrogen in effluent by sulfur-oxidizing bacteria that consume sulfur and carbonate as nutrients and is characterized by containing particles of calcium carbonate dispersed in sulfur. Preferably, the composition contains 10 parts by weight of sulfur coexisting with 10-15 parts by weight of calcium carbonate and 1-3 parts by weight of a microporous substance. This denitrifying composition can be prepared by heating powder of calcium carbonate and sulfur thereby melting the sulfur, dispersing the powder of calcium carbonate in liquid sulfur and solidifying the dispersion by rapid cooling. The composition simultaneously contains nutrients and alkali source and hence enables denitrification to proceed stably without addition of other components.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: May 11, 2004
    Assignees: Nitchitsu Co., Ltd, Nippon Steel Chemical Co., Ltd.
    Inventors: Atsushi Yatagai, Tomomichi Gunji, Hiroshi Masujima, Takuma Yabe, Toru Oishi
  • Voice decoder, voice decoding method and program for decoding voice signals
    Publication number: 20020052739
    Abstract: A voice decoder comprises the first voice decoding circuit which is specialized for decoding narrow band voice signal, the second voice decoding circuit which is specialized for decoding wide band voice signals, and a band determination circuit which determines whether a target signal to be decoded is a narrow band voice signal or wide band voice signal. The band determination circuit supplies the first voice decoding circuit with the target signal in a case where it is determined that the target signal is a narrow band voice signal, and supplies the second voice decoding circuit with the target signal in a case where it is determined that the target signal is a wide band voice signal. The first voiced decoding circuit decodes the supplied target signal. The second voice decoding circuit decodes the supplied target signal.
    Type: Application
    Filed: October 30, 2001
    Publication date: May 2, 2002
    Applicant: NEC CORPORATION
    Inventor: Toru Oishi