H. H. SCOTT

Audio-Frequency, Video-Frequency, Carrier-Frequency, Noise and Radio-Frequency Signal Generators; Sound-Level Meters; Sound Analyzers; Meters Including Voltmeters, Ammeters, Wattmeters and Differential Voltmeters; Electronbeam or Cathode-Ray Devices and Indicators; Electro-Optical Indicators; Electrical Signal-Level Indicators; Sound and Radio Detecting Apparatus; and Stroboscopic Devices