Patents by Inventor David Christman

David Christman 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: 11088999
    Abstract: A “trusted domain” is established within which content received from a communications network, e.g., a cable TV network, is protected from unauthorized copying thereof, in accordance with the invention. In an illustrative embodiment, the trusted domain includes a device associated with a user which receives content from the cable TV network. The content may be encrypted using a content key in accordance, e.g., with a 3DES encryption algorithm before it is stored in the device. In addition, a first encrypted content key version and a second encrypted content key version are generated by respectively encrypting the content key with a public key associated with the device and another public key associated with the user, in accordance with public key cryptography. The first and second encrypted content key versions are stored in association with the encrypted content in the device storage.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: August 10, 2021
    Assignee: TIME WARNER CABLE ENTERPRISES LLC
    Inventors: William Helms, Michael T. Hayashi, Kevin J. Leddy, David A. Christman
  • Publication number: 20190215310
    Abstract: A “trusted domain” is established within which content received from a communications network, e.g., a cable TV network, is protected from unauthorized copying thereof, in accordance with the invention. In an illustrative embodiment, the trusted domain includes a device associated with a user which receives content from the cable TV network. The content may be encrypted using a content key in accordance, e.g., with a 3DES encryption algorithm before it is stored in the device. In addition, a first encrypted content key version and a second encrypted content key version are generated by respectively encrypting the content key with a public key associated with the device and another public key associated with the user, in accordance with public key cryptography. The first and second encrypted content key versions are stored in association with the encrypted content in the device storage.
    Type: Application
    Filed: January 7, 2019
    Publication date: July 11, 2019
    Inventors: William Helms, Michael T. Hayashi, Kevin J. Leddy, David A. Christman
  • Patent number: 10178072
    Abstract: A “trusted domain” is established within which content received from a communications network, e.g., a cable TV network, is protected from unauthorized copying thereof, in accordance with the invention. In an illustrative embodiment, the trusted domain includes a device associated with a user which receives content from the cable TV network. The content may be encrypted using a content key in accordance, e.g., with a 3DES encryption algorithm before it is stored in the device. In addition, a first encrypted content key version and a second encrypted content key version are generated by respectively encrypting the content key with a public key associated with the device and another public key associated with the user, in accordance with public key cryptography. The first and second encrypted content key versions are stored in association with the encrypted content in the device storage.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: January 8, 2019
    Assignee: Time Warner Cable Enterprises LLC
    Inventors: William Helms, Michael T. Hayashi, Kevin J. Leddy, David A. Christman
  • Publication number: 20160182461
    Abstract: A “trusted domain” is established within which content received from a communications network, e.g., a cable TV network, is protected from unauthorized copying thereof, in accordance with the invention. In an illustrative embodiment, the trusted domain includes a device associated with a user which receives content from the cable TV network. The content may be encrypted using a content key in accordance, e.g., with a 3DES encryption algorithm before it is stored in the device. In addition, a first encrypted content key version and a second encrypted content key version are generated by respectively encrypting the content key with a public key associated with the device and another public key associated with the user, in accordance with public key cryptography. The first and second encrypted content key versions are stored in association with the encrypted content in the device storage.
    Type: Application
    Filed: July 2, 2015
    Publication date: June 23, 2016
    Inventors: William Helms, Michael T. Hayashi, Kevin J. Leddy, David A. Christman
  • Patent number: 9083513
    Abstract: A “trusted domain” is established within which content received from a communications network, e.g., a cable TV network, is protected from unauthorized copying thereof, in accordance with the invention. In an illustrative embodiment, the trusted domain includes a device associated with a user which receives content from the cable TV network. The content may be encrypted using a content key in accordance, e.g., with a 3DES encryption algorithm before it is stored in the device. In addition, a first encrypted content key version and a second encrypted content key version are generated by respectively encrypting the content key with a public key associated with the device and another public key associated with the user, in accordance with public key cryptography. The first and second encrypted content key versions are stored in association with the encrypted content in the device storage.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: July 14, 2015
    Assignee: Time Warner Cable Enterprises LLC
    Inventors: William Helms, Michael T. Hayashi, Kevin J. Leddy, David A. Christman
  • Publication number: 20130070922
    Abstract: A “trusted domain” is established within which content received from a communications network, e.g., a cable TV network, is protected from unauthorized copying thereof, in accordance with the invention. In an illustrative embodiment, the trusted domain includes a device associated with a user which receives content from the cable TV network. The content may be encrypted using a content key in accordance, e.g., with a 3DES encryption algorithm before it is stored in the device. In addition, a first encrypted content key version and a second encrypted content key version are generated by respectively encrypting the content key with a public key associated with the device and another public key associated with the user, in accordance with public key cryptography. The first and second encrypted content key versions are stored in association with the encrypted content in the device storage.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 21, 2013
    Inventors: William Helms, Michael T. Hayashi, Kevin J. Leddy, David A. Christman
  • Patent number: 8266429
    Abstract: A “trusted domain” is established within which content received from a communications network, e.g., a cable TV network, is protected from unauthorized copying thereof, in accordance with the invention. In an illustrative embodiment, the trusted domain includes a device associated with a user which receives content from the cable TV network. The content may be encrypted using a content key in accordance, e.g., with a 3DES encryption algorithm before it is stored in the device. In addition, a first encrypted content key version and a second encrypted content key version are generated by respectively encrypting the content key with a public key associated with the device and another public key associated with the user, in accordance with public key cryptography. The first and second encrypted content key versions are stored in association with the encrypted content in the device storage.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: September 11, 2012
    Assignee: Time Warner Cable, Inc.
    Inventors: William Helms, Michael T. Hayashi, Kevin J. Leddy, David A. Christman
  • Patent number: 8204354
    Abstract: A system and method for controlling a digital video recorder on a cable network. Signaling associated with the answering or initiation of a digital telephone call by a digital telephone subscriber is used to issue commands to a digital video recorder (DVR). A signal is generated by an MTA when the telephone is enters an “off-hook” state and sent to the DVR to initiate recording of a program being viewed by the called party. When the phone goes “on-hook”, the called party resumes watching the program from exactly where it was interrupted. The MTA may be connected directly to the VTD/DVR and the telephone state is determined by the DVR from information provided by the MTA. Alternatively, a soft switch monitors signaling from the MTA indicative of the state of the called telephone. A telephone state message comprising the telephone state information is then sent over an out-of-band channel/path to a DVR client within the VTD. The DVR client uses the telephone state information to control a DVR.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: June 19, 2012
    Assignee: Time Warner Cable, Inc.
    Inventors: Paul Alexander, Christopher P. Williams, Kenneth Gould, David Christman
  • Publication number: 20090060152
    Abstract: A system and method for controlling a digital video recorder on a cable network. Signaling associated with the answering or initiation of a digital telephone call by a digital telephone subscriber is used to issue commands to a digital video recorder (DVR). A signal is generated by an MTA when the telephone is enters an “off-hook” state and sent to the DVR to initiate recording of a program being viewed by the called party. When the phone goes “on-hook”, the called party resumes watching the program from exactly where it was interrupted. The MTA may be connected directly to the VTD/DVR and the telephone state is determined by the DVR from information provided by the MTA. Alternatively, a soft switch monitors signaling from the MTA indicative of the state of the called telephone. A telephone state message comprising the telephone state information is then sent over an out-of-band channel/path to a DVR client within the VTD. The DVR client uses the telephone state information to control a DVR.
    Type: Application
    Filed: November 12, 2008
    Publication date: March 5, 2009
    Inventors: Paul Alexander, Christopher P. Williams, Kenneth Gould, David Christman
  • Patent number: 7486869
    Abstract: A system and method for controlling a digital video recorder on a cable network. Signaling associated with the answering or initiation of a digital telephone call by a digital telephone subscriber is used to issue commands to a digital video recorder (DVR). A signal is generated by an MTA when the telephone is enters an “off-hook” state and sent to the DVR to initiate recording of a program being viewed by the called party. When the phone goes “on-hook”, the called party resumes watching the program from exactly where it was interrupted. The MTA may be connected directly to the VTD/DVR and the telephone state is determined by the DVR from information provided by the MTA. Alternatively, a soft switch monitors signaling from the MTA indicative of the state of the called telephone. A telephone state message comprising the telephone state information is then sent over an out-of-band channel/path to a DVR client within the VTD. The DVR client uses the telephone state information to control a DVR.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: February 3, 2009
    Assignee: Time Warner Cable, Inc.
    Inventors: Paul Alexander, Christopher P. Williams, Kenneth Gould, David Christman
  • Publication number: 20070235129
    Abstract: Apparatuses and methods for joining structural members. In one embodiment, an apparatus for joining a first member to a second member includes a first part and a second part configured to be engaged with and bonded to the first part. In one aspect of this embodiment, the first part includes a first surface facing a first direction, a second surface facing a second direction different than the first direction, a first recess at least proximate to the first surface, and a second recess at least proximate to the second surface. In another aspect of this embodiment, the second part includes a third surface facing a third direction, a fourth surface facing a fourth direction different than the third direction, a first protuberance at least proximate to the third surface, and a second protuberance at least proximate to the fourth surface.
    Type: Application
    Filed: September 19, 2005
    Publication date: October 11, 2007
    Applicant: The Boeing Company
    Inventors: David Christman, William Roeseler
  • Publication number: 20060115058
    Abstract: A system and method for controlling a digital video recorder on a cable network. Signaling associated with the answering or initiation of a digital telephone call by a digital telephone subscriber is used to issue commands to a digital video recorder (DVR). A signal is generated by an MTA when the telephone is enters an “off-hook” state and sent to the DVR to initiate recording of a program being viewed by the called party. When the phone goes “on-hook”, the called party resumes watching the program from exactly where it was interrupted. The MTA may be connected directly to the VTD/DVR and the telephone state is determined by the DVR from information provided by the MTA. Alternatively, a soft switch monitors signaling from the MTA indicative of the state of the called telephone. A telephone state message comprising the telephone state information is then sent over an out-of-band channel/path to a DVR client within the VTD. The DVR client uses the telephone state information to control a DVR.
    Type: Application
    Filed: December 1, 2004
    Publication date: June 1, 2006
    Inventors: Paul Alexander, Christopher Williams, Kenneth Gould, David Christman
  • Publication number: 20060020786
    Abstract: A “trusted domain” is established within which content received from a communications network, e.g., a cable TV network, is protected from unauthorized copying thereof, in accordance with the invention. In an illustrative embodiment, the trusted domain includes a device associated with a user which receives content from the cable TV network. The content may be encrypted using a content key in accordance, e.g., with a 3DES encryption algorithm before it is stored in the device. In addition, a first encrypted content key version and a second encrypted content key version are generated by respectively encrypting the content key with a public key associated with the device and another public key associated with the user, in accordance with public key cryptography. The first and second encrypted content key versions are stored in association with the encrypted content in the device storage.
    Type: Application
    Filed: July 20, 2004
    Publication date: January 26, 2006
    Inventors: William Helms, Michael Hayashi, Kevin Leddy, David Christman
  • Publication number: 20050171885
    Abstract: The present invention involves a computer system and method for evaluating a portfolio of insurance policies system and method which evaluates the portfolio. The computer determines relevant data from a database of experiential data relating to insurance policies. Also, characteristics of a portfolio of insurance policies are analyzed and identified by the computer for correspondence to the relevant data. The computer calculates a valuation for the portfolio based on the experiential data and the analyzed characteristics. The database of experiential data relating to insurance policies has financial data and associated demographic data. The computer also indexes policies of the portfolio based on predetermined risk factors. The experiential data may be updated and the valuation recalculated when new experiential data is obtained.
    Type: Application
    Filed: November 3, 2004
    Publication date: August 4, 2005
    Inventors: David Christman, James Wallace, Melanie Otto, Kathy Yeary