Patents by Inventor Charles Leight

Charles Leight 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).

  • Banded earplug
    Patent number: 4819624
    Abstract: Earplug assemblies are provided for mounting at the ends of a resilient band, which readily deform to tightly seal to the walls of the ear that surround the entrance to the ear canal. Each assembly includes a shell having a closed forward end that presses against the ear and an open rear end that receives an armature mounted on the band. The shell has a front end tapered at a large angle such as 90.degree., while the armature has a forward portion tapered at a small angle such as 20.degree., to leave an air gap between the forward portions of the shell and armature. With the forward tip of the armature pressing against the center of the shell front, outer portions of the shell front can deflect rearwardly and radially inwardly into the air gap.
    Type: Grant
    Filed: June 18, 1987
    Date of Patent: April 11, 1989
    Inventors: Howard S. Leight, Charles Leight, Frederic A. Leight
  • Ear plug
    Patent number: 4094315
    Abstract: A sound-reducing ear plug formed of a soft plastic and adapted to fit into ear canals of different sizes.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: June 13, 1978
    Inventor: Charles Leight
  • Ear plug
    Patent number: D242743
    Type: Grant
    Filed: August 28, 1975
    Date of Patent: December 14, 1976
    Inventor: Charles Leight
  • Ear plug
    Patent number: D264249
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: May 4, 1982
    Inventor: Charles Leight
  • Ear plug with flanges
    Patent number: D265129
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: June 22, 1982
    Inventor: Charles Leight