Patents by Inventor Teruo Touma

Teruo Touma 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).

  • Patent number: 4554655
    Abstract: An optical data recording disc has a protrusion forming layer which is formed on a gas generating metal layer, and the gas generating metal layer, in turn, is formed on an optically polished disc. An optical beam is modulated by data and impinges on the gas generating metal layer, which locally evaporates the metal layer to form a gas. The gas expands and produces protrusions in the protrusion forming layer, and these protrusions are representative of the data. Accordingly, because the protrusions are formed essentially simultaneously with the recording operation, it is possible to reproduce the data being recorded immediately after the data is recorded so that failures in a recording device or in the optical data recording disc can be detected immediately.
    Type: Grant
    Filed: February 23, 1983
    Date of Patent: November 19, 1985
    Assignee: Pioneer Video Corporation
    Inventors: Osamu Kumasaka, Teruo Touma
  • Patent number: 4135601
    Abstract: A diaphragm for use in a loud speaker is constructed of a substrate formed into a diaphragm configuration from a thin plate or a sheet composed of an organic or an inorganic substance, and a coating layer made of boron, or, an alloy of which a major component is boron or a chemical compound of boron, being provided onto at least the surface of said substrate.
    Type: Grant
    Filed: April 3, 1978
    Date of Patent: January 23, 1979
    Assignee: Pioneer Electronic Corporation
    Inventors: Tsunehiro Tsukagoshi, Teruo Touma, Masami Kimura