Patents by Inventor John W. Marron

John W. Marron 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: 4936181
    Abstract: A harp is provided for mounting on a swinging door. The harp includes a centrally disposed opening and a plurality of musical strings stretched over the opening. A plurality of mallets is provided for striking the strings when the door undergoes swinging motion, thereby emitting musical tones. Each mallet includes a stiff rod having a mallet head at one end, bearings mounted in tandem on a stiff on a shaft are provided into which the rods insert for oscillatory movement of the mallet heads about the shaft. In contrast to door harp of the prior art, the harp can be mounted on a door with its strings tilted away from horizontal.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: June 26, 1990
    Inventor: John W. Marron