- Karbrite
- Kemtec
- Kerkau
- Konus
- La Motte
- Lab Aids
- Lab Connections
- Learning Resources
- Luster Leaf
- LW Scientific
- Milwaukee
- Nasco
- Neo/Sci
- New Star Environmental
- NewPath Learning
- Ohaus
- Orion
- PicoTurbine
- Post Apple
- Primary Fluid Systems
- Public Lab
- Quest Aerospace
- Quincy
- Raylabcon, Inc.
- RB Manufacturing