Patents Assigned to Dopler Labs, Inc.
  • Passive audio ear filters with multiple filter elements
    Patent number: 9131308
    Abstract: There is disclosed a passive acoustical filter including two or more filter elements coupled between an ambient and a listener's ear, each of the filter elements selected from the group consisting of a low pass filter element, a high pass filter element, a band reject filter element, and a band pass filter element.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: September 8, 2015
    Assignee: Dopler Labs, Inc.
    Inventors: Noah Kraft, Richard Fritz Lanman, Dan Wiggins, Jonathan Oswaks, Nils Jacob Palmborg