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Computer implemented method and apparatus for fulfilling a request for information content with a user-selectable version of a file containing that information content

  • US 7,243,122 B2
  • Filed: 09/30/2004
  • Issued: 07/10/2007
  • Est. Priority Date: 09/01/1998
  • Status: Expired due to Term
First Claim
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1. A method for communicating between computers interconnected by a communications network, the method comprising the steps of:

  • (a) receiving, at a deriving computer, a request from a client computer for transmission to the client of a user-selected version of a target file, the target file having particular informational content independent of its embodiment in a particular version;

    (b) responsive to receiving the request in step (a), transmitting from the deriving computer to a server computer distinct from the deriving computer a request for transmission to the deriving computer of a materialized parent file from which the user-selected version may be derived by conversion, the materialized parent file being stored on the server computer;

    (c) at the deriving computer, deriving by conversion the user-selected version from the materialized file, the materialized file having a first file format, the user-selected version derived by conversion having a second file format different from the first file format; and

    (d) transmitting, from the deriving computer to the client computer, the user-selected version.

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