Patents by Inventor Takeshi Isii

Takeshi Isii 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).

  • Magnetron having specific dimensions for solving noise problem
    Patent number: 6844680
    Abstract: In such a case that a radial dimension of an outer circumference of a small-diameter strap ring of a magnetron is equal to “Rs1”, a radial dimension of an inner circumference of a large-diameter strap ring is equal to “Rs2”, a radius of a circumference which is inscribed to tip portions of anode vanes is equal to “Ra”, and a radius of a central flat portion of a magnetic piece, which is located in the vicinity of each of the anode vanes, is equal to “Rp”, the respective values of Ra, Rs1, Rs2, Rp are set in such a manner that the below-mentioned formulae (1) and (2) can be established: 1.85Ra?(Rs1+Rs2)/2?1.96Ra??(1) Rs1<Rp<Rs2??(2).
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: January 18, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masanori Yoshihara, Toshiyuki Tsukada, Hideki Ohguri, Etsuo Saitou, Takeshi Isii
  • Magnetron
    Publication number: 20040012349
    Abstract: In such a case that a radial dimension of an outer circumference of a small-diameter strap ring of a magnetron is equal to “Rs1”, a radial dimension of an inner circumference of a large-diameter strap ring is equal to “Rs2”, a radius of a circumference which is inscribed to tip portions of anode vanes is equal to “Ra”, and a radius of a central flat portion of a magnetic piece, which is located in the vicinity of each of the anode vanes, is equal to “Rp”, the respective values of Ra, Rs1, Rs2, Rp are set in such a manner that the below-mentioned formulae (1) and (2) can be established:
    Type: Application
    Filed: July 16, 2003
    Publication date: January 22, 2004
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masanori Yoshihara, Toshiyuki Tsukada, Hideki Ohguri, Etsuo Saitou, Takeshi Isii