Patents by Inventor Hisao Yamakawa

Hisao Yamakawa 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).

  • Keyboard apparatus, electronic apparatus, and method of producing the keyboard apparatus
    Patent number: 8491209
    Abstract: A keyboard apparatus includes: a plurality of keys; a switching section that detects depression of each of the keys; a top cover that is integrally formed with a partitioning portion separating adjacent keys from each other; a frame member that includes a plurality of key receiving portions which, in a case where the frame member is attached to the top cover, support the keys in a manner that the keys are placed in spaces surrounded by the partitioning portion; a first coupling section that couples the top cover with the frame member; and a second coupling section that couples a first surface portion of the keyboard apparatus including the switching section, with a second surface portion of the keyboard apparatus including the top cover and the frame member with which the top cover is coupled by the first coupling section.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: July 23, 2013
    Assignee: Sony Corporation
    Inventors: Hisao Yamakawa, Yohei Ishii, Masayoshi Koganei, Akihito Shinohara, Yutaka Ogasawara
  • Keyboard apparatus, electronic apparatus, and method of producing the keyboard apparatus
    Publication number: 20090079593
    Abstract: A keyboard apparatus includes: a plurality of keys; a switching section that detects depression of each of the keys; a top cover that is integrally formed with a partitioning portion separating adjacent keys from each other; a frame member that includes a plurality of key receiving portions which, in a case where the frame member is attached to the top cover, support the keys in a manner that the keys are placed in spaces surrounded by the partitioning portion; a first coupling section that couples the top cover with the frame member; and a second coupling section that couples a first surface portion of the keyboard apparatus including the switching section, with a second surface portion of the keyboard apparatus including the top cover and the frame member with which the top cover is coupled by the first coupling section.
    Type: Application
    Filed: September 19, 2008
    Publication date: March 26, 2009
    Inventors: Hisao Yamakawa, Yohei Ishii, Masayoshi Koganei, Akihito Shinohara, Yutaka Ogasawara