Educational services, namely, training in the use, importance, installation, maintenance and related operation of water treatment and conditioning equipment

water treatment and water conditioning systems composed primarily of water filtration units and water conditioning units for domestic, commercial and industrial use

Optical devices and systems, namely, retroreflectors, cell mounted retroreflectors, rigid mount retroreflectors, and flange mounted retroreflectors; optical inspection apparatus for industrial use, namely, retroreflectors, spherically mounted retroreflectors, and lateral transfer retroreflectors

Loudspeakers, loudspeaker enclosures, speaker compresion drivers and speaker horns and parts thereof, sound amplifiers and microphones

LOUDSPEAKERS, LOUDSPEAKER ENCLOSURES, SPEAKER COMPRESSION DRIVERS AND SPEAKER HORNS AND PARTS THEREOF, SOUND AMPLIFIERS AND MICROPHONES

Customized electronic control systems for machines; programmable logic controller (PLC); industrial process control software for generating computer readable markings; customized control cabinets specially adapted for electronic control systems for machines

Optical devices and systems; Optical inspection apparatus for industrial use; retroreflectors

optical devices and systems, namely, retroreflectors, cell mounted retroreflectors, rigid mount retroreflectors, and flange mounted retroreflectors; optical inspection apparatus for industrial use, namely, retroreflectors, spherically mounted retroreflectors, and lateral transfer retroreflectors