Patents by Inventor Toshiyuki Aita

Toshiyuki Aita 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).

  • Hexaboride electron emissive material
    Patent number: 3932314
    Abstract: An electron emissive material of the formula (Y.sub.1.sub.-x EU.sub.x)B.sub.6 having the calcium hexaboride type crystal structure can easily produce hexaborides of the single phase. These borides have a number of merits such as small work function, high mechanical properties and low vapor pressure, and they are far more excellent than prior-art materials when used in a thermionic emission cathode and a field emission type cold cathode.
    Type: Grant
    Filed: September 5, 1974
    Date of Patent: January 13, 1976
    Assignee: Hitachi, Ltd.
    Inventors: Ushio Kawabe, Shigehiko Yamamoto, Toshiyuki Aita, Yukio Honda