Stephen T. Walker — 10 Patents at Information Systems

Stephen T. Walker has been granted 10 US patents while listed as an inventor at Information Systems. The first was granted in 1990 and the most recent in September 2013. Stephen T. Walker ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Stephen T. Walker in Bethesda, MD, US.

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
8534986	Bundle insertion/extraction system and method	Cyril John Borer, Jeffrey C. Edick, David Suain	2013-09-17	$25,489,000
6272632	System and method for controlling access to a user secret using a key recovery field	David Carman, David M. Balenson, Homayoon Tajalli	2001-08-07
5991406	System and method for data recovery	Steven B. Lipner, David M. Balenson, Carl M. Ellison	1999-11-23
5956403	System and method for access field verification	Steven B. Lipner, David M. Balenson, Carl M. Ellison	1999-09-21
5745573	System and method for controlling access to a user secret	Steven B. Lipner, David M. Balenson, Carl M. Ellison	1998-04-28	$5,998,000
5640454	System and method for access field verification	Steven B. Lipner, David M. Balenson, Carl M. Ellison	1997-06-17	$3,217,000
5557346	System and method for key escrow encryption	Steven B. Lipner, David M. Balenson, Carl M. Ellison	1996-09-17
5557765	System and method for data recovery	Steven B. Lipner, David M. Balenson, Carl M. Ellison	1996-09-17
5361359	System and method for controlling the use of a computer	Homayoon Tajalli, Mark Lee Badger, David I. Dalva	1994-11-01
4962533	Data protection for computer systems	Steven D. Krueger, Martha A. Branstad	1990-10-09	$4,559,000

Stephen T. Walker — 10 Patents

Issued Patents All Time

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