Patents by Inventor Toshiyuki Hoshijima

Toshiyuki Hoshijima 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).

  • Portable electronic device
    Patent number: 7450976
    Abstract: A portable electronic device of the present invention includes a cabinet and a speaker placed inside the cabinet. The cabinet has one or more sound radiating holes in an area opposed to a front face of the speaker. A dustproof plate formed by attaching a dustproof net and a reinforcing sheet to each other is placed on the front face of the speaker or an inner face of the cabinet opposed to the front face. The reinforcing sheet has a plurality of openings formed for passing through sound waves from the speaker.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: November 11, 2008
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Toshiyuki Hoshijima
  • Portable electronic device
    Publication number: 20050277450
    Abstract: A portable electronic device of the present invention includes a cabinet and a speaker placed inside the cabinet. The cabinet has one or more sound radiating holes in an area opposed to a front face of the speaker. A dustproof plate formed by attaching a dustproof net and a reinforcing sheet to each other is placed on the front face of the speaker or an inner face of the cabinet opposed to the front face. The reinforcing sheet has a plurality of openings formed for passing through sound waves from the speaker.
    Type: Application
    Filed: April 27, 2005
    Publication date: December 15, 2005
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventor: Toshiyuki Hoshijima