Patents by Inventor Minoru Yahagi

Minoru Yahagi 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).

  • Tape cassette having a front lid and a back lid
    Patent number: 4893766
    Abstract: A tape cassette is disclosed, in which upon non-use a tape-exposed portion is closed by a front lid and a back lid provided at the tape-exposed portion of a reel-to-reel type tape cassette. In this case, an injection gate is provided at a thick portion of a front wall of the front lid at its central portion thereby to mold the front lid.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: January 16, 1990
    Assignee: Sony Corporation
    Inventors: Shuichi Yamashina, Minoru Yahagi, Yuji Iwahashi
  • Magnetic tape cassette having a translucent rough surface on a reel flange
    Patent number: 4771353
    Abstract: A magnetic tape cassette includes means comprising a translucent, rough surface formed on the upper flange. The rough surface has a roughness on a scale of 5 to 20 .mu.m, and preferably 5 to 10 .mu.m.
    Type: Grant
    Filed: September 22, 1986
    Date of Patent: September 13, 1988
    Assignee: Sony Corporation
    Inventors: Koushi Yamaguchi, Minoru Yahagi