Patents by Inventor Tadashi Shiosaki

Tadashi Shiosaki 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).

  • Pyroelectric ceramic composition
    Patent number: 5141903
    Abstract: There is provided a pyroelectric ceramic composition of the general formula:X--PbZrO.sub.3 --Y--Pb(Zn.sub.1/3 NB.sub.2/3)O.sub.3 --Z--PbTiO.sub.3where X+Y+Z=1, X=0.07, 0.82.ltoreq.X.ltoreq.0.93, O<Y.ltoreq.0.11, and having both of high pyroelectric constant and the second transition temperature below its Curie's temperature. Further, the material comprising the combination of the fired powders having the different compositions of the above formula, each from the other can be more useful.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: August 25, 1992
    Assignee: Mitsubishi Mining and Cement Co. Ltd.
    Inventors: Akira Kawabata, Tadashi Shiosaki, Tamotsu Ueyama, Mikiya Ono
  • Sezawa surface acoustic wave device using a piezoelectric layer over a nitride layer on a substrate
    Patent number: 4571519
    Abstract: A surface acoustic wave device comprising a surface acoustic wave substrate member composed by forming an aluminum nitride film and a thin zinc oxide film successively on a glass substrate. The thickness h.sub.1 of the aluminum nitride film and the thickness h.sub.2 of the zinc oxide film are set within ranges of 0.1.ltoreq.h.sub.1 /.lambda..ltoreq.10 and 0.05.ltoreq.h.sub.2 /.lambda..ltoreq.0.3 (where .lambda. is representative of wavelength of Sezawa wave) respectively, thereby to utilize Sezawa wave or a similar mode wave transmitted on the surface acoustic wave substrate member in multi-layer structure.
    Type: Grant
    Filed: November 30, 1984
    Date of Patent: February 18, 1986
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Akira Kawabata, Tadashi Shiosaki, Fumio Takeda, Satoru Fujishima, Hideharu Ieki