Patents by Inventor David Mattis

David Mattis 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).

  • WEARABLE ACTIVE NOISE REDUCTION (ANR) DEVICE HAVING LOW FREQUENCY FEEDBACK LOOP MODULATION
    Publication number: 20240112662
    Abstract: Various aspects include a wearable audio device having active noise reduction (ANR). In some cases, a method for processing audio signals includes receiving a noise reduction signal configured to modify an audio signal and generate a noise reduced audio signal, the noise reduction signal having a nominal loop gain; and generating an adjusted noise reduction signal in response to a detected adverse low frequency event, the adjusted noise reduction signal having a modulated loop gain configured to reduce artifacts in the noise reduced audio signal.
    Type: Application
    Filed: December 4, 2023
    Publication date: April 4, 2024
    Inventors: Ole Mattis Nielsen, David J. Warkentin, Lei Cheng, Brandon Lee Olmos, Michael P. O'Connell
  • Electronic Key System and Method
    Publication number: 20070188302
    Abstract: The present invention provides an electronic key system including an electrical/electronic key-like device and an electrical/electronic key receptacle capable of receiving a contactless type, contact type, or both types of key-like devices. The present invention further provides an electronic key system including an electrical/electronic key-like device and an intelligent electrical/electronic key receptacle wherein the system is capable of performing a transaction between the key-like device and the key receptacle after the key-like device is inserted into the key receptacle and moved to a predetermined position.
    Type: Application
    Filed: December 28, 2006
    Publication date: August 16, 2007
    Inventors: Gerry Waring, Bill Stifle, David Mattis
  • Electronic key system and method
    Patent number: 7158008
    Abstract: The present invention provides an electronic key system including an electrical/electronic key-like device and an electrical/electronic key receptacle capable of receiving a contactless type, contact type, or both types of key-like devices. The present invention further provides an electronic key system including an electrical/electronic key-like device and an intelligent electrical/electronic key receptacle wherein the system is capable of performing a transaction between the key-like device and the key receptacle after the key-like device is inserted into the key receptacle and moved to a predetermined position.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: January 2, 2007
    Assignee: Datakey Electronincs, Inc.
    Inventors: Gerry Waring, Bill Stifle, David Mattis
  • Electronic key system and method
    Publication number: 20030184432
    Abstract: The present invention provides an electronic key system including an electrical/electronic key-like device and an electrical/electronic key receptacle capable of receiving a contactless type, contact type, or both types of key-like devices. The present invention further provides an electronic key system including an electrical/electronic key-like device and an intelligent electrical/electronic key receptacle wherein the system is capable of performing a transaction between the key-like device and the key receptacle after the key-like device is inserted into the key receptacle and moved to a predetermined position.
    Type: Application
    Filed: March 29, 2002
    Publication date: October 2, 2003
    Inventors: Gerry Waring, Bill Stifle, David Mattis