Patents by Inventor Patrick J. McCormack

Patrick J. McCormack 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).

  • Secure management of keys using control vectors with multi-path checking
    Patent number: 5103478
    Abstract: A requested cryptographic function is validated for performance in conjunction with a cryptographic key, by inputting a first portion of an associated control vector into a first control vector checker, which outputs a first authorization signal if the requested cryptographic function has been authorized by the originator of the key. A second portion of the control vector is input to a second control vector checker, which outputs a second authorization signal if the requested cryptographic function has been authorized by the originator of the key. Both the first and the second authorization signals are applied to a cryptographic processor which initiates the execution of the requested cryptographic function.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: April 7, 1992
    Assignee: International Business Machines Corporation
    Inventors: Stephen M. Matyas, Dennis G. Abraham, Donald B. Johnson, Ramesh K. Karne, An V. Le, Patrick J. McCormack, Rostislaw Prymak, John D. Wilkins
  • Ice-skating exercise device
    Patent number: 4781372
    Abstract: An ice-skating leg exercise device utilizing in one embodiment a pair of rotatably positionable tracks each having a stirrup movable back and forth thereon in which the user's legs are positioned, each track being angularly adjustable with adjustable weight resistance provided against the rearward movement of each stirrup and a body support for the user to rest thereagainst while exercising his legs on the device.
    Type: Grant
    Filed: April 15, 1987
    Date of Patent: November 1, 1988
    Inventor: Patrick J. McCormack