1.   Fon-Lin Lai and Ah-Hwee Tan. Method and system for validating content of text documents. Invention disclosure P2002025. Filed in 2003.

2.  Ah-Hwee Tan. Method and system for knowledge discovery from text. PCT Patent Application No. PCT/SG02/00249. International Filing Date: 24 Oct 2002. International Publication Number WO 2004/042493, filed 21 May 2004.

3.  Ah-Hwee Tan, Hwee-Leng Ong, Jamie Ng, Hong Pan. Method and system for personalized information management. Singapore Patent Application No. 200401311-6 based on PCT Patent Application No. PCT/SG01/00189 filed 14 Sep 2001.

4.  Ah-Hwee Tan. Method and system for user-configurable clustering of information. Invention disclosure 047/99/KNW/TY, Kent Ridge Digital Labs. Singapore Patent Application Number SG/200003177-3.European Patent Application No. 99946569.3 based on PCT Patent Application No. PCT/SG99/00089 filed 25 Aug 1999; U.S. Patent Application Number US/09,875,271. Filed in 2000.

5.  Ah-Hwee Tan and Fon-Lin Lai. Document classification apparatus. Singapore Patent P-No. 86506 [WO 01/14992], granted 31 May 2004. Singapore Patent Application No. 200200401-8 based on PCT Patent Application No. PCT/SG99/00089 filed 25 Aug 1999. US Patent Application Number US10/049,627. Filed in 1999.