Patents by Inventor David A. Barr

David A. Barr 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: 7577850
    Abstract: A method for using an identification value for a security application is disclosed. The method may include the steps of (A) generating the identification value based on a plurality of semiconductor fabrication process variations, (B) generating a key by reducing a bit error rate of the identification value, wherein the key may not be available external to the security application and (C) generating an output signal by one of (i) encoding and (ii) decoding an input signal in response to said key.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: August 18, 2009
    Assignee: LSI Corporation
    Inventor: David A. Barr
  • Patent number: 7536355
    Abstract: A method for securing a content is disclosed. The method generally includes the steps of (A) generating a media key by decrypting a media key block based on a device key unique to a particular player of a plurality of players, (B) modifying the media key by decryption based on a class key such that the media key is unique for each of a plurality of subscriber classes, (C) writing an encrypted title key in a media by encrypting a title key based on both the media key after modification and a media identification value unique to the media and (D) writing an encrypted content in the media by encrypting the content based on the title key.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: May 19, 2009
    Assignee: LSI Corporation
    Inventors: David A. Barr, Aaron G. Wells
  • Publication number: 20080139083
    Abstract: A toy or play set is provided that includes one or more components having a sensor with a state, and an actuator coupled to the sensor. The sensor is capable of sensing an action of a user/object in the play area or a proximity of the object and setting the state of the sensor in accordance with the sensed action or proximity. A controller determines the state of the sensor and performs or initiates an action in accordance with the state of the sensor.
    Type: Application
    Filed: November 8, 2007
    Publication date: June 12, 2008
    Applicant: KidKraft LP
    Inventors: Steven Lampert, David A. Barr
  • Patent number: 6925181
    Abstract: A system controls reproduction of a video transmission between a transmitter and a receiver. The system includes an encryptor with an offset generator adapted to receive the encrypted frame key and to generate a sequence of pseudo-random values for the color component; and an adder coupled to the offset generator and to the color component signal for providing an encoded color component signal. The system also includes a decryptor with a decryptor offset generator adapted to receive the encrypted frame key and to generate a decryptor pseudo-random value for the color component; and a subtractor coupled to the offset generator and to the color component signal for subtracting the offset signal from the color component signal.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: August 2, 2005
    Assignee: LSI Logic Corporation
    Inventors: Leslie Kohn, David A. Barr, Didier Le Gall
  • Publication number: 20030138102
    Abstract: A system controls reproduction of a video transmission between a transmitter and a receiver. The system includes an encryptor with an offset generator adapted to receive the encrypted frame key and to generate a sequence of pseudo-random values for the color component; and an adder coupled to the offset generator and to the color component signal for providing an encoded color component signal. The system also includes a decryptor with a decryptor offset generator adapted to receive the encrypted frame key and to generate a decryptor pseudo-random value for the color component; and a subtractor coupled to the offset generator and to the color component signal for subtracting the offset signal from the color component signal.
    Type: Application
    Filed: January 30, 2003
    Publication date: July 24, 2003
    Inventors: Leslie Kohn, David A. Barr, Didier Le Gall
  • Patent number: 6570990
    Abstract: A system controls reproduction of a video transmission between a transmitter and a receiver. The system includes an encryptor with an offset generator adapted to receive the encrypted frame key and to generate a sequence, of pseudo-random values for the color component; and an adder coupled to the offset generator and to the color component signal for providing an encoded color component signal. The system also includes a decryptor with a decryptor offset generator adapted to receive the encrypted frame key and to generate a decryptor pseudo-random value for the color component; and a subtractor coupled to the offset generator and to the color component signal for subtracting the offset signal from the color component signal.
    Type: Grant
    Filed: November 13, 1998
    Date of Patent: May 27, 2003
    Assignee: LSI Logic Corporation
    Inventors: Leslie Kohn, David A. Barr, Didier Le Gall
  • Patent number: 6179748
    Abstract: A doorway mounted chin-up bar has a rod with an interior tube that is telescopically received within a rotating sleeve. A mount is positioned on each end of the rod for securing the rod to a doorjamb. A pair of U-shaped extension bars extend outward and upward from the rod. Each of the extension bars have first and second ends that extend out of planes that are defined by the doorway in first and second directions, respectively. A first hand-grip bar is affixed to the first ends of the extension bars and a second hand-grip bar is affixed to the second ends of the extension bars. When a user grasps the first hand-grip bar and pulls down, the extension bars pivot about the rod until the second hand-grip bar engages a wall surface above the doorway. The user may engage in chin-ups while being supported by the first hand-grip bar. Alternatively, a user may grasp the second hand-grip bar and pull down until the first hand-grip bar engages a wall surface above the doorway.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: January 30, 2001
    Assignee: Bollinger Industries, L.P.
    Inventor: David A. Barr
  • Patent number: 5265910
    Abstract: An adjusting device for a vehicle seat belt assembly will adjust the inclination of the shoulder portion of the belt to accommodate children. The adjusting device is a plate which has an inboard slot, an outboard slot, and an upper slot. The shoulder and lap portions of the web overlie one another and pass through the inboard slot, across one of the sides of the plate, and through the outboard slot. The shoulder portion outboard of the plate passes upward past the other side of the plate and through the upper slot. The plate can manually slide to various positions prior to inserting the shoulder portion through the upper slot.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: November 30, 1993
    Assignee: Buckle Buddy Corporation
    Inventors: David A. Barr, Steve Burke, Michael L. Fowler
  • Patent number: 5226066
    Abstract: An angiography system is described for acquiring both cine-film and T.V. or digital video images for at least two planes, including at a rate of 30 fps per plane. In one embodiment of the present invention, a single-channel digital acquisition system comprises a frontal x-ray source with corresponding frontal T.V. and frontal cine-film cameras, a lateral x-ray source with corresponding lateral T.V. and cine-film cameras, and circuitry for eliminating motion artifacts.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: July 6, 1993
    Assignee: Adac Laboratories
    Inventor: David A. Barr
  • Patent number: 5084912
    Abstract: A cardiac angiography system is configured to generate a non-cardiac angiograph by generating a blanking signal for a TV camera according to a desired non-cardiac image rate and image accumulation interval, while triggering the X-ray source to generate X-ray pulses typical for a cardiac application. The X-ray pulses are triggered by a shutter signal which has a pulse repetition rate greater than that typically used for a non-cardiac application so as to cause a plurality of X-ray pulses during the accumulation interval of the TV camera. The resulting plurality of X-ray pulse images are accumulated at the TV camera to form a single image frame for the non-cardiac exam. After a specified accumulation time, the TV camera closes the frame, sending the resulting video signal to a computer system for conversion, processing and storage. Resulting image data is used to form a display on a CRT and/or a printout as a hard-copy photograph.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: January 28, 1992
    Assignee: ADAC Laboratories
    Inventor: David A. Barr
  • Patent number: D282463
    Type: Grant
    Filed: June 3, 1983
    Date of Patent: February 4, 1986
    Assignee: Phonetics, Inc.
    Inventors: David A. Barr, Kenneth E. Blanchard, Frederick F. Dalessio, Bernard A. Grae
  • Patent number: D286289
    Type: Grant
    Filed: November 29, 1983
    Date of Patent: October 21, 1986
    Assignee: Tandy Corporation
    Inventors: David A. Barr, Bernard A. Grae