- ALPHA RESOURCES
- BUEHLER
- COLE PARMER
- DIFCO
- EM SCIENCE
- EXTEC
- FISHER
- FISHERBRAND
- GRIEVE
- HACH
- INSTRON
- J. T. BAKER
- MERCK
- METROHM
- MILLIPORE
- MSA
- NALGENE
- NIST
- NICHIRYO
- OHAUS
- ORION RESEARCH
- OSMONICS
- PERKIN ELMER
- PYREX
- SARTORIUS
- THERMOLYNE
- TINUS OLSEN
- UNITRON
- VWR
- WHATMAN
- WTW
- WS TYLER