Patents by Inventor Mamora Nakasuji

Mamora Nakasuji 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).

  • Electron gun and electron beam apparatus field of invention
    Publication number: 20070228922
    Abstract: For three types of the electron gun the brightness larger than Langmuir limit or the very high Emittance is obtained through a simulation. The first electron gun consists of a concave cathode and a convex anode, and for the gun with the cathode radius of Rc (mm) the emission current Ie (A) which give the brightness larger than Langmuir limit is in the range as, 0.733Rc?0.5?Ie?0.159Rc3+0.35. Rc?2.5 mm, or 0.733Rc?0.5?Ie?0.255Rc3?1.17. Rc>2.5 mm. The second electron gun consist of a flat cathode and a convex anode, and for the gun with a distance between the cathode and the anode of Dac (mm) the emission current Ie (mA) which give the brightness larger than Langmuir limit or the very high Emittance is in the range as, 0.388/Dac?0.046?Ie?92.8/Dac+9.28, Dac?3 mm, or 0.388/Dac?0.046?Ie?22/Dac+32.7, Dac<3 mm.
    Type: Application
    Filed: February 8, 2007
    Publication date: October 4, 2007
    Inventor: Mamora Nakasuji