73277589
Sep 12, 1980
Dec 15, 1981
Portable Sound Control and Amplification Devices-Namely, Mixer/Amplifiers, Speakers, and Microphones; and Portable Stage Units-All for Use by Music Groups
Electrical and Scientific ApparatusPortable Lighting Devices-Namely, Light Control Units, Light Boxes with Gel and Diffuser Holders, and Supports Therefor for Use by Music Groups
Environmental Control Apparatus