Classification Information
Amplifiers; Anti-glare glasses; Containers for contact lenses; Covers for electric outlets; Dog whistles; Egg-candlers; Electric buzzers; Electric connectors; Electric converters; Electric door bells; Electric switches; Eyeglasses; Keyboard covers; Locks, electric; Nose clips for divers and swimmers; Pince-nez chains; Spectacle cases; Time switches; Transducers that utilize ultrasonic oscillations to test for stress and fatigue in metal and metal structures; Transducers that utilize ultrasonic oscillations to treat and reduce stress and fatigue of metals and metal structures; Tube amplifiers
Electrical and Scientific Apparatus