Patents by Inventor Fumitoshi Sasaki

Fumitoshi Sasaki 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 and key top lighting device in an electronic apparatus
    Patent number: 6917005
    Abstract: A key top, a key top lighting device and an electronic apparatus with improved operability for use in the dark is provided wherein the key top can be illuminated at a low power consumption rate and without disturbing the people nearby. Specifically, a transparent fluorescent ink that emits fluorescent light upon being irradiated by black light having a wavelength within a range of 300 nm to 450 nm is printed on the key top, and a black light lamp irradiates the black light on this key top, so that the operability of the key top can be improved when used in the dark.
    Type: Grant
    Filed: March 12, 2003
    Date of Patent: July 12, 2005
    Assignee: Mitsumi Electric Co., Ltd.
    Inventor: Fumitoshi Sasaki
  • Key top and key top lighting device in an electronic apparatus
    Publication number: 20030217911
    Abstract: A key top, a key top lighting device and an electronic apparatus with improved operability for use in the dark is provided wherein the key top can be illuminated at a low power consumption rate and without disturbing the people nearby. Specifically, a transparent fluorescent ink that emits fluorescent light upon being irradiated by black light having a wavelength within a range of 300 nm to 450 nm is printed on the key top, and a black light lamp irradiates the black light on this key top, so that the operability of the key top can be improved when used in the dark.
    Type: Application
    Filed: March 12, 2003
    Publication date: November 27, 2003
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Fumitoshi Sasaki