Patents by Inventor Jeffrey A. Lueken

Jeffrey A. Lueken 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).

  • Stereo mixing jack
    Patent number: 4803728
    Abstract: An adapter for interfacing between the output of a stereophonic sound source and a standard headphone set to suppress either the lead vocal and instrumental sound signals or in a second embodiment to suppress the left channel of a reproduced sound recording.
    Type: Grant
    Filed: June 23, 1987
    Date of Patent: February 7, 1989
    Inventor: Jeffrey A. Lueken