Patents by Inventor Thomas E. Longwell

Thomas E. Longwell 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).

  • Electroacoustic transducer with resistance to shock-waves
    Patent number: 7995789
    Abstract: A transducer comprising a pair of spaced magnets at least partially forming a tunnel having a central axis. A coil having a first and a second side wall and an upper and a lower wall at least partially forms the tunnel. A reed having a central portion extends through the tunnel. The reed has a stationary end, a deflection end, and a tip portion which lies at least partially between the magnets, wherein the reed is mounted for deflection towards or away from the respective magnets.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: August 9, 2011
    Assignee: Knowles Electronics, LLC
    Inventors: Paris Tsangaris, Thomas E. Longwell, Thomas E. Miller, Dennis Ray Kirchhoefer, Daniel M. Warren
  • Electro-acoustic transducer with resistance to shock-waves
    Patent number: 7236609
    Abstract: A transducer comprising a pair of spaced magnets at least partially forming a tunnel having a central axis. A coil having a first and a second side wall and an upper and a lower wall at least partially forms the tunnel. A reed having a central portion extends through the tunnel. The reed has a stationary end, a deflection end, and a tip portion which lies at least partially between the magnets, wherein the reed is mounted for deflection towards or away from the respective magnets.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: June 26, 2007
    Assignee: Knowles Electronics, LLC.
    Inventors: Paris Tsangaris, Thomas E. Longwell, Thomas E. Miller, Dennis Ray Kirchhoefer, Daniel M. Warren