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).
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Patent number: 7577850Abstract: 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: GrantFiled: April 15, 2005Date of Patent: August 18, 2009Assignee: LSI CorporationInventor: David A. Barr
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Patent number: 7536355Abstract: 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: GrantFiled: December 22, 2004Date of Patent: May 19, 2009Assignee: LSI CorporationInventors: David A. Barr, Aaron G. Wells
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Publication number: 20080139083Abstract: 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: ApplicationFiled: November 8, 2007Publication date: June 12, 2008Applicant: KidKraft LPInventors: Steven Lampert, David A. Barr
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Patent number: 6925181Abstract: 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: GrantFiled: January 30, 2003Date of Patent: August 2, 2005Assignee: LSI Logic CorporationInventors: Leslie Kohn, David A. Barr, Didier Le Gall
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Publication number: 20030138102Abstract: 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: ApplicationFiled: January 30, 2003Publication date: July 24, 2003Inventors: Leslie Kohn, David A. Barr, Didier Le Gall
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Patent number: 6570990Abstract: 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: GrantFiled: November 13, 1998Date of Patent: May 27, 2003Assignee: LSI Logic CorporationInventors: Leslie Kohn, David A. Barr, Didier Le Gall
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Patent number: 6179748Abstract: 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: GrantFiled: February 9, 1999Date of Patent: January 30, 2001Assignee: Bollinger Industries, L.P.Inventor: David A. Barr
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Patent number: 5265910Abstract: 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: GrantFiled: February 26, 1992Date of Patent: November 30, 1993Assignee: Buckle Buddy CorporationInventors: David A. Barr, Steve Burke, Michael L. Fowler
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Patent number: 5226066Abstract: 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: GrantFiled: August 29, 1991Date of Patent: July 6, 1993Assignee: Adac LaboratoriesInventor: David A. Barr
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Patent number: 5084912Abstract: 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: GrantFiled: October 15, 1990Date of Patent: January 28, 1992Assignee: ADAC LaboratoriesInventor: David A. Barr
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Patent number: D282463Type: GrantFiled: June 3, 1983Date of Patent: February 4, 1986Assignee: Phonetics, Inc.Inventors: David A. Barr, Kenneth E. Blanchard, Frederick F. Dalessio, Bernard A. Grae
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Patent number: D286289Type: GrantFiled: November 29, 1983Date of Patent: October 21, 1986Assignee: Tandy CorporationInventors: David A. Barr, Bernard A. Grae