Patents by Inventor Masafumi Yamada

Masafumi 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).

  • Radiation measurement device
    Publication number: 20040206909
    Abstract: A radiation measurement device includes a radiation detector generating an analog signal containing pulse components, an A/D converter converting the analog signal into sampled data, an n-th power pulse discrimination unit calculating n-th power values of the sampled data to discriminate the pulse component, where n is two or more, and a pulse counter counting a number of the discriminated pulse components.
    Type: Application
    Filed: May 13, 2004
    Publication date: October 21, 2004
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Mikio Izumi, Masafumi Yamada, Tatsuyuki Maekawa, Teruji Tarumi
  • High-purity cyclopentane compound having oxygen-containing group, process for preparing same, and perfume composition
    Patent number: 6653276
    Abstract: A composition comprising at least 60% by weight, based on the weight of the composition, of a cyclopentanone or cyclopentanol compound having 2,5-dicyclopentylidene substituents, 2,5-dicyclopentyl substituents or 2-cyclopentylidene-5-cyclopentyl substituents. This composition is useful as perfume emitting floral fragrance. 2,5-Dicyclopentylidenecyclopentane (compound 4) is prepared by reaction of 2-cyclopentylidenecyclopentanone with cyclopentanone. 2,5-Dicyclopentylcyclopentanone (compound 5) and 2,5-dicyclopentylidenecyclopentanol (compound 6) are prepared by reduction of compound 4. 2,5-Dicyclopentylcyclopentanol (compound 7) is prepared by reduction of compound 5 or compound 6.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: November 25, 2003
    Assignee: Zeon Corporation
    Inventors: Masafumi Yamada, Hiroshi Fujisawa
  • High-purity cyclopentane compound having oxygen-containing group, process for preparing same, and perfume composition
    Publication number: 20030012799
    Abstract: A composition comprising at least 60% by weight, based on the weight of the composition, of a cyclopentanone or cyclopentanol compound having 2,5-dicyclopentylidene substituents, 2,5-dicyclopentyl substituents or 2-cyclopentylidene-5-cyclopentyl substituents. This composition is useful as perfume emitting floral fragrance. 2,5-Dicyclopentylidenecyclopentane (compound 4) is prepared by reaction of 2-cyclopentylidenecyclopentanone with cyclopentanone. 2,5-Dicyclopentylcyclopentanone (compound 5) and 2,5-dicyclopentylidenecyclopentanol (compound 6) are prepared by reduction of compound 4. 2,5-Dicyclopentylcyclopentanol (compound 7) is prepared by reduction of compound 5 or compound 6.
    Type: Application
    Filed: May 23, 2001
    Publication date: January 16, 2003
    Inventors: Masafumi Yamada, Hiroshi Fujisawa
  • Radiation measurement device
    Publication number: 20020146087
    Abstract: A radiation measurement device includes a radiation detector generating an analog signal containing pulse components, an A/D converter converting the analog signal into sampled data, an n-th power pulse discrimination unit calculating n-th power values of the sampled data to discriminate the pulse component, where n is two or more, and a pulse counter counting a number of the discriminated pulse components.
    Type: Application
    Filed: March 27, 2002
    Publication date: October 10, 2002
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Mikio Izumi, Masafumi Yamada, Tatsuyuki Maekawa, Teruji Tarumi