Patents by Inventor Edward J. Perutis

Edward J. Perutis 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).

  • Electronic musical instrument keyboard
    Patent number: 4043244
    Abstract: A musical instrument keyboard consisting of a spring metal plate stamped into the shape of a comb with the back of the comb clamped in position and the teeth thereof mounting the keys, characterized by low cost, and including provision for comparable pressure of operation as between the long lever (white) keys and the short lever (black) keys, and requiring no soft side guides or the hardware to mount them.
    Type: Grant
    Filed: December 13, 1974
    Date of Patent: August 23, 1977
    Assignee: Hammond Corporation
    Inventors: Ray B. Schrecongost, Edward J. Perutis