Patents by Inventor Maria R. Allen

Maria R. Allen 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).

  • Patent number: 4480519
    Abstract: An improved keyboard for a musical instrument includes a plurality of keys arranged in a side-by-side order, all lying in a common plane. Different embodiments of the invention have a varying number of keys per octave, from as small as 12 keys per octave to as high as 90-120 keys per octave. In those embodiments of the invention in which the number of keys per octave results in a key whose width is too narrow to be uniquely depressed by an operator's finger, associated apparatus determines from a plurality of keys which have been depressed, a particular tone to be produced. The keyboard may be associated with apparatus to distinguish one set of keys from other sets of keys, which apparatus can include a selectively energizable light source associated with each different key or other equivalent apparatus.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: November 6, 1984
    Assignee: Yolanda M. Arellano
    Inventor: Maria R. Allen