Patents by Inventor Sadao Hasebe

Sadao Hasebe 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).

  • Key top
    Patent number: 4042090
    Abstract: A key top comprises a key top base comprising a side portion and a top portion having a specified color, a colored portion provided at a part of the top portion and having a color different from the specified color of the top portion, and, a protective layer composed of a transparent material having an abrasion resistance and covering at least the colored portion.
    Type: Grant
    Filed: September 17, 1974
    Date of Patent: August 16, 1977
    Assignees: Canon Kabushiki Kaisha, K.K. Chiyoda Gurabiya Insatsusha
    Inventors: Sadao Hasebe, Hiromitsu Ono, Minoru Murata, Yuji Harada