Electronic Door and Window Openers; Telephones; Electronic Page Turners; Electronic Calculators; Electronic Alarms; Radios; Televisions; Record Players; Tape Recorders; Adaptor Boxes; Distribution Boxes; Receivers; Transmittors; Single Electronic Instruments Used to Control a Number of Other Electronic Instruments by Remote Control; Electronic Multipliers which Allow Two Different Electronic Instruments to be Controlled Over a Single Channel; Dolleys for Integrated Installations-Namely, Wheel...