Patents by Inventor Leo J. Knapp

Leo J. Knapp 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 guitar equipped with asymmetrical humbucking electromagnetic pickup
    Patent number: 5292998
    Abstract: An electric guitar is equipped with an asymmetric humbucking electromagnetic pickup for strings stretched thereover, and the asymmetric humbucking electromagnetic pickup has two comb-shaped core members with a predetermined pitch respectively wound by coil members, wherein the two comb-shaped core members are staggered by half of the pitch so that each of the strings are different in distance from the two comb-shaped core members, thereby allowing the asymmetric humbucking electromagnetic pickup to convert any high-order harmonic component to a signal component without sacrifice of anti-noise characteristics.
    Type: Grant
    Filed: March 31, 1992
    Date of Patent: March 8, 1994
    Assignee: Yamaha Corporation
    Inventor: Leo J. Knapp