Calculating scales; Calculators and calculating machines; Microscope objectives; Speaker microphones; Telescopic sights; Audio speaker enclosures; Bass speakers; Conical attachment to an audio speaker for diffusing and distributing sound as it is transmitted from the speaker; Cover glass for microscope slides; Electronic calculators; Electronic signaling mechanism, namely, a train control system used in the railway industry for detecting and controlling trains, ground faults, broken rails, power failures, track switches and lights; Loud speaker systems; Loud speakers; Metallurgical microscopes; Operating microscope stands; Radio receivers and transmitters for monitoring and controlling light emitting diodes in a network of street lights and for processing emergency signals transmitted to individual street lights; Rotating lights; Traffic-light apparatus; Tripods; Zenith telescopes
Electrical and Scientific Apparatus