Patents by Inventor Masatugu Arai

Masatugu Arai 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).

  • Stack-type piezoelectric element, process for producing the same, and stack-type piezoelectric device
    Patent number: 5196756
    Abstract: According to the present invention, there are provided a stack-type piezoelectric element constructed of a stacked body comprising plural layers of sintered piezoelectric ceramic material and electrodes which lie between the respective layers of the piezoelectric ceramic material, wherein said electrodes are formed of a material capable of diffusion-bonding with said piezoelectric ceramic material at a lower temperature than the sintering temperature of said ceramic material, a process for producing the same, and a stack-type piezoelectric device using said stack-type piezoelectric element.
    Type: Grant
    Filed: August 29, 1990
    Date of Patent: March 23, 1993
    Assignee: Hitachi Ltd.
    Inventors: Akiomi Kohno, Masatugu Arai, Takeshi Harada