Patents by Inventor Mamoru Osata

Mamoru Osata 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 system
    Patent number: 4177872
    Abstract: A speaker system employs: a baffle board in front of a cabinet made of wood, with a woofer mounted on the baffle board; and a sub-baffle board having a medium-range speaker and a tweeter mounted thereon. The sub-baffle board comprises a metal board and a damping plate such as a rubber plate laminated on the metal plate.
    Type: Grant
    Filed: February 28, 1978
    Date of Patent: December 11, 1979
    Assignee: Sony Corporation
    Inventors: Shinichi Watanabe, Shigeru Okazaki, Mamoru Osata