Recently, Desire2Learn served on Blackboard its Preliminary Invalidity Contentions, which is an analysis of D2L's view about why the Blackboard patent was invalidly issued by the USPTO.
This is a 70 page PDF that contains a detailed and lengthy analysis of prior art at the time of the Blackboard patent filing. They specifically refer to 60 pieces of evidence of prior art (pages 3-7) that "anticipate and/or render obvious the asserted claims of the ’138 patent." Some of the included prior art include:
- 1. Educom/NLII Instructional Management Systems Specifications Document, Ver. 0.5 (April 29, 1998)
- 2. IMS Prototype, first public use and/or sale occurred on or before April 29, 1998
- 3. Janison Solutions, Web Training Toolbox Management Guide (May 1999)
- 13. Ceilidh Version 2.7, first public use and/or sale occurred on or before January 1997; http://www.cs.nott.ac.uk/~ceilidh/papers.html
- 14. Fred T. Hofstetter, Serf User Guide Version 1.0, University Of Delaware (Jan. 1998)
- 21. TopClass Version 2.0.0 Administrator’s Guide, (March 1998)
- 24. D. F. Ferraiolo and D. R. Kuhn, “Role Based Access Control” (1992)
- 39. ClassNet, first public use and/or sale occurred on or before September 1, 1996; http://www.iastate.edu/Inside/1996/0906/classnet.html
- 41. Daedalus® Integrated Writing Environment for Windows Computers Version 5.3x, Administrator’s Guide with Installation Guide (November 30, 1997)
- 46. FirstClass Intranet Server, first public use and/or sale occurred on or before 1997
- 56. WebCT, first public use and/or sale occurred on or before September 15, 1997; Alan Levine, WebCT @ PC, The Labyrinth, (Fall 1997, Vol. 6 Issue 1)
This document and many more related to the Blackboard lawsuit and other fun things related to the U.S. Patent & Trademark office can be found here at the D2L website.