Patents by Inventor Howard W. Bertram

Howard W. Bertram 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).

  • Music teaching apparatus
    Patent number: 4881443
    Abstract: The apparatus includes a base associated with a rotatable display disc representing notes of a musical keyboard, such notes being separated by spaced intervals in proportion to the musical intervals of pitch between the indicated notes. The base has a longitudinally moveable section which may be brought into registry with another indicia to provide visualization of the interrelationship between musical notes. The apparatus may include a keyboard as the longitudinally moveable section, and indicia relative to the longitudinally moveable section may indicate chords relative to a base note.
    Type: Grant
    Filed: August 3, 1988
    Date of Patent: November 21, 1989
    Assignee: Mutech - Music Technologies, Inc.
    Inventor: Howard W. Bertram