Patents by Inventor Yasuhiro Fukunaka

Yasuhiro Fukunaka 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: 8007650
    Abstract: Disclosed is a low-cost, high quality metal nanotube comprising Ni, Fe, Co or the like. A metal thin film having a thickness of 10 to 80 nm is formed as a cathode on one surface of a film having penetrated holes, and an electrolyte solution is filled between an anode and the cathode to which a voltage is applied. Metal ions in the electrolyte solution are electrochemically deposited on the walls of the penetrated holes, thereby forming metal nanotubes. A thermoplastic resin porous film such as a polycarbonate film, an alumina porous film or aluminum anodic oxide film may be used as the film, and the diameters of the penetrated holes are preferably 15 to 500 nm. The metal thin film can be formed by sputtering, and preferably comprises a platinum-palladium alloy. The electrochemical processing of nanostructured tailored materials is a unique technique.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: August 30, 2011
    Inventors: Yasuhiro Fukunaka, Yoko Konishi, Munekazu Motoyama, Ryuji Ishii
  • Publication number: 20070284257
    Abstract: Disclosed is a low-cost, high quality metal nanotube comprising Ni, Fe, Co or the like. A metal thin film having a thickness of 10 to 80 nm is formed as a cathode on one surface of a film having penetrated holes, and an electrolyte solution is filled between an anode and the cathode to which a voltage is applied. Metal ions in the electrolyte solution are electrochemically deposited on the walls of the penetrated holes, thereby forming metal nanotubes. A thermoplastic resin porous film such as a polycarbonate film, an alumina porous film or aluminum anodic oxide film may be used as the film, and the diameters of the penetrated holes are preferably 15 to 500 nm. The metal thin film can be formed by sputtering, and preferably comprises a platinum-palladium alloy. The electrochemical processing of nanostructured tailored materials is a unique technique.
    Type: Application
    Filed: October 13, 2004
    Publication date: December 13, 2007
    Inventors: Yasuhiro Fukunaka, Munekazu Motoyama, Ryuji Ishii
  • Patent number: 6658128
    Abstract: An electroacoustic transducer of a horn loudspeaker emits sound, which is supplied through a sound conduit pipe to a horn and propagated out of the horn through a mouth of the horn. The sound conduit pipe is coupled to the horn via a rectangular opening in the upper one of the upper and lower walls forming the horn, to thereby provide a linear sound source for the loudspeaker. The location where the sound conduit pipe is coupled to the horn and/or the tilt angle of the sound conduit pipe with respect to the horn may be varied to control the sound radiation characteristic of the loudspeaker.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: December 2, 2003
    Assignee: TOA Corporation
    Inventors: Tsutomu Yoshioka, Yasuhiro Fukunaka, Hiroshi Kubota, Ken Iwayama