Patents by Inventor Tohru Nogiwa

Tohru Nogiwa 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).

  • Reversible thermosensitive recording medium and method of producing the same
    Patent number: 5985077
    Abstract: A reversible thermosensitive recording medium having a support, a reversible thermosensitive recording layer formed thereon which contains a matrix resin and an organic low-molecular-weight material dispersed in the matrix resin, capable of reversibly assuming a transparent state and a white opaque state depending on the temperature thereof, and a magnetic recording layer formed on the reversible thermosensitive recording layer, and optionally, an anchor layer, which is provided on the reversible thermosensitive recording layer. The magnetic recording layer is integrally provided in a part of the reversible thermosensitive recording layer or the anchor layer by a step of fusion-bonding, applying, or transferring.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: November 16, 1999
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukio Konagaya, Takao Igawa, Fumihito Masubuchi, Akihide Itoh, Tohru Nogiwa
  • Reversible thermosensitive recording material
    Patent number: 5869421
    Abstract: A reversible thermosensitive recording material has a support and a reversible thermosensitive recording layer formed thereon, capable of reversibly assuming at least two different visible states depending upon the temperature thereof, containing an organic low-molecular weight material and a resin composition in which the organic low-molecular weight material is dispersed, the resin composition including a matrix resin, and a dispersion resin which has a glass transition temperature higher than that of the matrix resin, and having resin aggregates which are separately dispersed in the matrix resin in such a manner that the resin aggregates are associated with the matrix resin.
    Type: Grant
    Filed: August 21, 1997
    Date of Patent: February 9, 1999
    Assignee: Ricoh Company, Ltd.
    Inventors: Atsushi Kutami, Tohru Nogiwa, Fumihito Masubuchi, Haruhiro Horiuchi, Tetsuya Amano
  • Method of producing reversible thermosensitive recording medium
    Patent number: 5762998
    Abstract: A reversible thermosensitive recording medium having a support, a reversible thermosensitive recording layer formed thereon which contains a matrix resin and an organic low-molecular-weight material dispersed in the matrix resin, capable of reversibly assuming a transparent state and a white opaque state depending on the temperature thereof, and a magnetic recording layer formed on the reversible thermosensitive recording layer, and optionally, an anchor layer, which is provided on the reversible thermosensitive recording layer. The magnetic recording layer is integrally provided in a part of the reversible thermosensitive recording layer or the anchor layer by a step of fusion-bonding, applying, or transferring.
    Type: Grant
    Filed: September 24, 1996
    Date of Patent: June 9, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukio Konagaya, Takao Igawa, Fumihito Masubuchi, Akihide Itoh, Tohru Nogiwa
  • Reversible thermosensitive recording label and reversible thermosensitive recording card
    Patent number: 5643851
    Abstract: A reversible thermosensitive recording label for reversibly forming images and erasing recorded images thereon is composed of a reversible thermosensitive recording member having a temperature-dependent transparency which reversibly changes depending upon the temperature thereof, an adhesive layer provided on the back side of the reversible thermosensitive recording member, and a disposable release sheet applied to the adhesive layer. A reversible thermosensitive recording card is composed of the reversible thermosensitive recording member, the adhesive layer provided on the back side of the reversible thermosensitive recording member, and a label receiving material to which the adhesive layer is applied.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: July 1, 1997
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukio Konagaya, Takao Igawa, Akihide Ito, Tohru Nogiwa, Tsutomu Kagawa, Nobuo Yamada
  • Reversible thermosensitive recording medium and method of producing the same
    Patent number: 5625524
    Abstract: A reversible thermosensitive recording medium having a support, a reversible thermosensitive recording layer formed thereon which contains a matrix resin and an organic low-molecular-weight material dispersed in the matrix resin, capable of reversibly assuming a transparent state and a white opaque state depending on the temperature thereof, and a magnetic recording layer formed on the reversible thermosensitive recording layer, and optionally, an anchor layer, which is provided on the reversible thermosensitive recording layer. The magnetic recording layer is integrally provided in a part of the reversible thermosensitive recording layer or the anchor layer by a step of fusion-bonding, applying, or transferring.
    Type: Grant
    Filed: July 27, 1995
    Date of Patent: April 29, 1997
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukio Konagaya, Takao Igawa, Fumihito Masubuchi, Akihide Itoh, Tohru Nogiwa