Patents by Inventor Eda Kazuo

Eda Kazuo 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).

  • Voltage-dependent resistor and method of making the same
    Patent number: 4386021
    Abstract: The present invention provides a voltage-dependent resistor of the bulk-type in which zinc oxide (ZnO) powder and additives are admixed to form a sintered body composition having as the main constituent, zinc oxide, and in which the mixture is formed into a resistor body, the body is sintered, and electrodes are applied to the opposite surfaces of the sintered body, the improvement comprising the step of, prior to sintering and admixture with said zinc oxide, admixing all amount of boron oxide (B.sub.2 O.sub.3) with other additives in the form of a borosilicate glass, which is composed of 5 to 30 weight percent of boron oxide (B.sub.2 O.sub.3) and 70 to 95 weight percent of silicon oxide (SiO.sub.2). A process for the production of said resistor is also provided.
    Type: Grant
    Filed: November 25, 1980
    Date of Patent: May 31, 1983
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Eda Kazuo, Kikuchi Yasuharu, Makino Osamu, Michio Matsuoka