Patents by Inventor Masakazu Hirao

Masakazu Hirao 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).

  • Speaker mounting structure of head rest in vehicle
    Patent number: 6975737
    Abstract: A speaker mounting structure is provided in a head rest at an upper portion of a seat. A pair of left and right speakers are mounted to the head rest, which has a through-bore at a central portion so the speakers only occupy a lower half of the through-bore.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: December 13, 2005
    Assignee: Honda Access Corporation
    Inventor: Masakazu Hirao
  • Speaker mounting structure of head rest in vehicle
    Publication number: 20030081795
    Abstract: A speaker mounting structure is provided in a head rest at an upper portion of a seat. A pair of left and right speakers are mounted to the head rest, which has a through-bore at a central portion so the speakers only occupy a lower half of the through-bore.
    Type: Application
    Filed: October 3, 2002
    Publication date: May 1, 2003
    Inventor: Masakazu Hirao