Patents by Inventor Dennis L. Gunn

Dennis L. Gunn 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).

  • Method for making an ear plug
    Patent number: 4372904
    Abstract: Method for making a coded, resilient ear plug including forming an impression with wax and release agent, investing the impression, agitating to remove air, hardening the investment and after removal of the impression material casting a hardenable material in the investment cavity.
    Type: Grant
    Filed: March 27, 1981
    Date of Patent: February 8, 1983
    Inventor: Dennis L. Gunn