Patents by Inventor Erling C. Hesla

Erling C. Hesla 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).

  • Telephone earpiece extension attachment
    Patent number: 4905276
    Abstract: The open end of a thin shell is snugly fitted over the earpiece of a standard telephone handset to secure the shell on the handset. Teeth or projections can extend inward from the sidewalls of the shell for snap-fit connection of the shell to the earpiece. The sidewalls of the shell project beyond the sound-emitting outer surface of the earpiece to an apertured outer surface of the shell against which the ear of a user can rest. The shell forms an extension attachment spacing the ear of a hearing aid wearer a distance from the earpiece sufficient to avoid generation of objectionable feedback sounds during use of the telephone.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: February 27, 1990
    Inventors: Harry Catey, Erling C. Hesla
  • Extension attachment for a telephone earpiece
    Patent number: D305027
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: December 12, 1989
    Inventors: Harry Catey, Erling C. Hesla
  • Extension attachment for a telephone earpiece
    Patent number: D311401
    Type: Grant
    Filed: August 25, 1989
    Date of Patent: October 16, 1990
    Inventors: Harry Catey, Erling C. Hesla