Patents by Inventor Laurence A. Langowski

Laurence A. Langowski 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).

  • Universal mute for vertical pianos
    Patent number: 4766796
    Abstract: A universal mute for vertical pianos that as a unit mounts to the tuning pins with adjustment capability to establish installability in existing vertical pianos of various size, age and origin.
    Type: Grant
    Filed: November 19, 1987
    Date of Patent: August 30, 1988
    Inventor: Laurence A. Langowski