The following patents on the Next-Generation Secure Computing Base (click the link for more details from the BA Wiki), a feature intended for "Longhorn", have expired:
- Paul England, John D. DeTreville, Butler W. Lampson (inventors) (11 December 2001 (publication date)).US6330670B1 - Digital rights management operating system - Google Patents.
Note: The US Patent and Trademark Office's Public Patent Application Information Retrieval states that this patent's status is "Patented Case" with a status date of "11-21-2001".
- William A. Arbaugh, David J. Farber, Angelos D. Keromytis, Jonathan M. Smith (inventors) (6 February 2001 (publication date)). US6185678B1 - Secure and reliable bootstrap architecture - Google Patents.
Note: The US Patent and Trademark Office's Public Patent Application Information Retrieval states that this patent's status is "Patented Case" with a status date of "01-19-2001".
- David P. Jablon, Nora E. Hanley (inventors) (30 May 1995 (publication date)). US5421006A - Method and apparatus for assessing integrity of computer system software - Google Patents.
Note: The US Patent and Trademark Office's Public Patent Application Information Retrieval states that this patent's status is "Patented Case" with a status date of "05-19-1995".
- Paul England, John D. DeTreville, Butler W. Lampson (inventors) (4 December 2001 (publication date)). US6327652B1 - Loading and identifying a digital rights management operating system - Google Patents.
Note: The US Patent and Trademark Office's Public Patent Application Information Retrieval states that this patent's status is "Patented Case" with a status date of "11-16-2001".
- Paul England, John D. DeTreville, Butler W. Lampson (20 March 2007). US7194092B1 - Key-based secure storage - Google Patents.
Note: The US Patent and Trademark Office's Public Patent Application Information Retrieval states that this patent's status is "Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362" with a status date of "04-22-2019".
- Paul England, John D. DeTreville, Butler W. Lampson (inventors) (16 November 2004 (publication date)). [url = https://patents.google.com/patent/US6820063]US6820063B1 - Controlling access to content based on certificates and access predicates - Google Patents.[/url]
Note: The US Patent and Trademark Office's Public Patent Application Information Retrieval states that this patent's status is "Patented Case" with a status date of "10-28-2004".
- Paul England, John D. DeTreville, Butler W. Lampson (inventors) (6 February 2007 (publication date)). [url = https://patents.google.com/patent/US7174457]US7174457B1 - System and method for authenticating an operating system to a central processing unit, providing the CPU/OS with secure storage, and authenticating the CPU/OS to a third party - Google Patents.[/url]
Note: The US Patent and Trademark Office's Public Patent Application Information Retrieval states that this patent's status is "Patented Case" with a status date of "01-17-2007".
- Paul England, Butler W. Lampson (18 November 2003 (publication date)). US6651171B1 - Secure execution of program code - Google Patents.
Note: The US Patent and Trademark Office's Public Patent Application Information Retrieval states that this patent's status is "Patented Case" with a status date of "10-30-2003".
- Paul England, Butler W. Lampson (10 August 2004 (publication date)). US6775779B1 - Hierarchical trusted code for content protection in computers - Google Patents.
Note: The US Patent and Trademark Office's Public Patent Application Information Retrieval states that this patent's status is "Patented Case" with a status date of "07-22-2004".
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Under patent law, anyone can now freely use the invention described in the patent. Note that other intellectual property rights may be involved. Use at your own risk. Disclaimer: For info purposes only, not legal advice. Info not from a lawyer in the United States of America.