Patents by Inventor Hisashi Kumagai

Hisashi Kumagai 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).

  • Method for growing beta-GaO-based single crystal film, and crystalline layered structure
    Patent number: 11982016
    Abstract: As one embodiment, the present invention provides a method for growing a ?-Ga2O3-based single crystal film by using HYPE method. The method includes a step of exposing a Ga2O3-based substrate to a gallium chloride-based gas and an oxygen-including gas, and growing a ?-Ga2O3-based single crystal film on a principal surface of the Ga2O3-based substrate at a growth temperature of not lower than 900° C.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: May 14, 2024
    Assignees: Tamura Corporation, National University Corporation Tokyo University of Agriculture and Technology
    Inventors: Ken Goto, Kohei Sasaki, Akinori Koukitu, Yoshinao Kumagai, Hisashi Murakami
  • Identification registration for a wireless transmission-reception control system
    Patent number: 5291193
    Abstract: A wireless transmission-reception control system in which the data transmitted as a radio wave from more than one wireless transmitter along with an ID code are received by a wireless receiver and decoded at a front end decoder. The ID code of the transmitted data thus received is compared by a comparer with the ID code of the transmitted data already registered at a data register to discriminate if a collation of the data is to be made [or not], and only the transmitted data, the registration of which is confirmed, are decoded to have an output generated. The wireless transmitters each have different, fixed ID codes, and the wireless receiver may be switched over at least between a mode of registering an ID code and a mode of generating an output after the decoding of the transmitted data.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: March 1, 1994
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Yoichi Isobe, Hiroshi Chujo, Kouichi Okumura, Hisashi Kumagai