Patents Represented by Attorney, Agent or Law Firm Leydig, Voit& Mayer, L
  • Patent number: 6259548
    Abstract: A micro-mirror device includes a mirror forming substrate on which a mirror is disposed. A pair of torsion beams are disposed on opposing sides of the mirror forming substrate. An anchor projects from a supporting substrate, supporting the ends of the torsion beams. A driving frame surrounds at least one side of the torsion beams and is connected to the mirror forming substrate through a link beam. A drive force generator drives the driving frame.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: July 10, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiro Tsugai, Nobuaki Konno, Hiroyuki Fujita, Makoto Mita, Hiroshi Toshiyoshi, Yoshio Mita
  • Patent number: 5740265
    Abstract: A loudspeaker unit includes a magnetic system of dual magnetic gaps formed with a permanent magnet disk carrying on both sides top and bottom plates and a cylindrical yoke surrounding the plates to form therebetween upper and lower magnetic gaps, and a vibratory system formed with a cylindrical voice coil bobbin carrying upper and lower voice coils for use in the dual magnetic gaps as disposed in half off-set state with respect to the gaps and a diaphragm coupled to upper end of the bobbin, the bobbin being supported by upper and lower dampers with respect to the magnetic system for vibration in axial directions of the magnetic system, allowing the bobbin to be supported at fulcrums positioned above and below voice-coil driving points.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: April 14, 1998
    Assignee: Foster Electric Co. Ltd.
    Inventor: Hidetoshi Shirakawa