Patents by Inventor Nagatoshi Yoshida

Nagatoshi Yoshida 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).

  • Combination microwave and gas oven
    Patent number: 4211909
    Abstract: A combination microwave and gas oven, in which an object to be heated is heat-treated by microwave energy and air heated by a gas burner inside a combustion chamber and forced to be circulated by a fan. A microwave introducing port to the heating cavity is covered with a heat insulating member provided with a film which can reflect the radiant energy transferred to the direction of the microwave introducing port. To prevent the leakage of microwave from the heating cavity especially related to a shaft of the fan which is connected to a driving motor located outside the heating cavity, a choke cavity for terminating leaked microwave from said cavity is provided.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: July 8, 1980
    Assignees: Sanyo Electric Co., Ltd., Tottori Sanyo Electric Co., Ltd.
    Inventors: Nagatoshi Yoshida, Yoshihito Taga
  • Combination microwave and gas oven
    Patent number: RE31637
    Abstract: A combination microwave and gas oven, in which an object to be heated is heat-treated by microwave energy and air heated by a gas burner inside a combustion chamber and forced to be circulated by a fan. A microwave introducing port to the heating cavity is covered with a heat insulating member provided with a film which can reflect the radiant energy transferred to the direction of the microwave introducing port. To prevent the leakage of microwave from the heating cavity especially related to a shaft of the fan which is connected to a driving motor located outside the heating cavity, a choke cavity for terminating leaked microwave from said cavity is provided.
    Type: Grant
    Filed: September 10, 1982
    Date of Patent: July 31, 1984
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Nagatoshi Yoshida, Yoshihito Taga