Trademarks

BioAdvantage, Thomson Instrument Company
BioAdvantage Basic, Thomson Instrument Company
BioAdvantage CL, Thomson Instrument Company
Hypersil, Hypersil
Inertsil, Gasukuro Kogyo
Kromasil, Akzo Nobel
Nucleosil, Macherey-Nagel
Rheodyne®, Rheodyne, LP
Spherisorb™, Waters Corporation
Shodex, Showa Denko, Inc.
SynChrom, Micra Scientific
Teflon, DuPont Company
TLCAdvantage, Thomson Instrument Company
TSK-GEL®, Tosohaas, Inc.
Ultrasphere, Beckman Instruments
Vydac®, The Separations Group
Viton, DuPont Dow Elastomers L.L.C.

10/2/01