Patents by Inventor Andrew Birrell

Andrew Birrell 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: 6098936
    Abstract: An adjustable computer work stand that will allow for convenient computer component placement for an individual in a non-conventional work environment. The work stand is portable and includes multiple adjustable support elements that can independently support the computer components including the keyboard, video monitor and CPU. The work stand can be adjusted to position a pair of support arms on which the components are placed to be accessible to the user in a reclining chair or other non-conventional work environment.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: August 8, 2000
    Inventor: Andrew Birrell
  • Patent number: 5235642
    Abstract: A distributed computer system has a number of computers coupled thereto at distinct nodes. The computer at each node of the distributed system has a trusted computing base that includes an authentication agent for authenticating requests received from principals at other nodes in the system. Requests are transmitted to servers as messages that include a first identifier provided by the requester and a second identifier provided by the authentication agent of the requester node. Each server process is provided with a local cache of authentication data that identifies requesters whose previous request messages have been authenticated. When a request is received, the server checks the request's first and second identifiers against the entries in its local cache. If there is a match, then the request is known to be authentic. Otherwise, the server node's authentication agent is called to obtain authentication credentials from the requester's node to authenticate the request message.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: August 10, 1993
    Assignee: Digital Equipment Corporation
    Inventors: Edward Wobber, Martin Abadi, Andrew Birrell, Butler Lampson