Patents by Inventor Katsuyuki Yamamoto

Katsuyuki Yamamoto 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 and apparatus for taking up tape
    Patent number: 4310130
    Abstract: A tape for a magnetic tape recorder or the like is taken up while the barometric pressure around the part of the take-up reel where the tape is being wound is kept below atmospheric pressure. The tape can thus be taken up in a stable manner at a high speed, by eliminating the tape floating force which is the basic cause of irregular take-up phenomenon.
    Type: Grant
    Filed: March 5, 1980
    Date of Patent: January 12, 1982
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takashi Ichiyanagi, Kiyokazu Imanishi, Hidetoshi Kawa, Katsuyuki Yamamoto