Patents by Inventor Katsuya Sugiyama

Katsuya Sugiyama 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).

  • Microtron electron accelerator
    Patent number: 5561697
    Abstract: Disclosed is a microtron electron accelerator having an accelerating cavity accepting microwave electric power for generating a high-frequency accelerating electric field E disposed within a uniform magnetic field B and adapted such that electrons are accelerated and caused to move in a circular trajectory under action of the magnetic field B and the electric field E, comprising an electron source formed of a cathode and an anode, which has a minute slit allowing an electron beam extracted from the cathode to pass therethrough, disposed on the outer side of the wall of the accelerating cavity, a first electron beam through-hole and a second electron beam through-hole formed in the wall of the accelerating cavity in two positions, with the electron source therebetween, along the decreasing or increasing direction of the strength of the electric field E in the accelerating cavity, and a third electron beam through-hole formed in the wall of the accelerating cavity in a position in confrontation with the first e
    Type: Grant
    Filed: January 13, 1995
    Date of Patent: October 1, 1996
    Assignee: Hitachi Medical
    Inventors: Atsuko Takafuji, Katsuya Sugiyama, Katsuhiro Kuroda, Keiji Koyanagi, Ichiro Miura, Masatoshi Nishimura
  • Microtron electron accelerator
    Patent number: 5399873
    Abstract: Disclosed is a microtron electron accelerator having an accelerating cavity accepting microwave electric power for generating a high-frequency accelerating electric field E disposed within a uniform magnetic field B and adapted such that electrons are accelerated and caused to move in a circular trajectory under action of the magnetic field B and the electric field E, comprising an electron source formed of a cathode and an anode, which has a minute slit allowing an electron beam extracted from the cathode to pass therethrough, disposed on the outer side of the wall of the accelerating cavity, a first electron beam through-hole and a second electron beam through-hole formed in the wall of the accelerating cavity in two positions, with the electron source therebetween, along the decreasing or increasing direction of the strength of the electric field E in the accelerating cavity, and a third electron beam through-hole formed in the wall of the accelerating cavity in a position in confrontation with the first e
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: March 21, 1995
    Assignee: Hitachi Medical
    Inventors: Atsuko Takafuji, Katsuya Sugiyama, Katsuhiro Kuroda, Keiji Koyanagi, Ichiro Miura, Masatoshi Nishimura