Patents by Inventor Hisaki Katoh

Hisaki Katoh 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).

  • Photomultiplier tube with focusing electrode plate having frame
    Patent number: 5880458
    Abstract: In the photomultiplier tube 1, the focusing electrode plate 17 has the focusing portion 20 for focusing incident electrons and the frame 21 surrounding the focusing portion 20. The focusing portion 20 has a plurality of slit openings 18. The dynode unit 10 is constructed from a plurality of dynode plates 11 laminated one on another. Each dynode plate 11 has a plurality of electron through-holes 13 located in confrontation with the plurality of slit openings 18. A plurality of anodes 9 are provided for receiving electrons emitted from the respective through-holes 13 of the dynode unit 10. The frame 21 has dummy openings 22 at positions located in confrontation with edges 15 of the first stage dynode plate 11a in the dynode unit 10.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: March 9, 1999
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Hideki Shimoi, Hiroyuki Kyushima, Hisaki Katoh