Patents by Inventor Marc L. Doty

Marc L. Doty 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).

  • Patent number: 8054985
    Abstract: A hearing protection device including a sound attenuating portion configured to be disposed within an ear canal of a user to obstruct a passage of sound, a channel formed through the sound attenuating portion configured to allow sound to pass through the sound attenuating portion when the portion is disposed within the ear canal, a tube disposed in the channel and configured to allow the sound in the channel to pass therethrough, and a filter disposed at one end of the tube and positioned at an interior of the sound attenuating portion, where the filter attenuates some of the sound passing through the tube.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: November 8, 2011
    Assignee: 3M Innovative Properties Company
    Inventor: Marc L. Doty
  • Patent number: 7510046
    Abstract: The invention provides an earplug and a method of forming thereof where the earplug includes an insertion portion having opposing top and bottom sides, a handle portion connected to and extending rearwardly from the bottom of the insertion portion, and a rear portion extending from the top of the insertion portion to the handle portion, where the insertion portion is configured to be partially inserted into an ear canal of a wearer, where the handle portion remains at least partially extending from the ear canal for use in handling the earplug, and where the insertion portion and the handle portion are integrally formed of a resilient compressible material.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: March 31, 2009
    Assignee: Cabot Safety Intermediate Corporation
    Inventor: Marc L. Doty
  • Patent number: D538924
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: March 20, 2007
    Assignee: Cabot Safety Intermediate Corporation
    Inventor: Marc L. Doty