Patents by Inventor Rick D. Prindle

Rick D. Prindle 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 illuminating a keypad
    Patent number: 6824288
    Abstract: Apparatus for back-lit illumination of key designation characters in a keypad has a plurality of individual translucent key cores arranged in a planar pattern, with a base membrane disposed between key cores and fitting around each key at least the outer ends of the key cores except for the key designation characters. An elastomeric, electroluminescent lamp (EEL) is held in assembly between the inner ends of the key cores and a domed switch panel, so as to illuminate the designation characters when activated and deform locally when a key is depressed.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: November 30, 2004
    Inventor: Rick D. Prindle
  • Method and apparatus for illuminating a keypad
    Publication number: 20030112620
    Abstract: Apparatus for back-lit illumination of key designation characters in a keypad has a plurality of individual translucent key cores arranged in a planar pattern, with a base membrane disposed between key cores and fitting around each key at least the outer ends of the key cores except for the key designation characters. An elastomeric, electroluminescent lamp (EEL) is held in assembly against the inner ends of the key cores so as to illuminate the designation characters when activated and deform locally when a key is depressed.
    Type: Application
    Filed: June 5, 2002
    Publication date: June 19, 2003
    Inventor: Rick D. Prindle