Infra- & ultrasound

• "High Frequency Sound Transmission System", Clarence Sprague, US Patent 1616639. 1927
• "Method and Apparatus for Producing Sound", George Ramsey, US Patent 1951669. 1934
• "Remote Control System", A. N. Goldsmith, US Patent 2345472. 1944
• "Signal Transmission and Receiving Apparatus", H. F. Olson, US Patent 2461344. 1949. Olsonworking for RCA, held numerous patents and developed the RCA synthesizer (also known as the Olson-Belar) with Herbert Belar.
• "Method of Extracting Oil From Fish Material", R. F. Shropshire, US Patent 2473453. 1949. uses low freq sound.
• "High Intensity Sound Generator", P. M. Platzman, US Patent 3160138. 1964. ultrasonically removes foam from shampoos, drive away birds, mice, and rats.
• "Apparatus for Drying and Treating Hair via Ultrasonics", R. W. Goble, US Patent 3302301. 1967
• "Locally-audible Sound System", W. T. Clark III, US Patent 3398810. 1968
• "Method of Producing Locally-occuring Infrasound", William T Clark, US Patent 3612211. 1971
• "Ultrasonic Rat Elimination System Having Random Modulation", Dominic Del Grande, US Patent 3636559. 1972

Vladimir Gavreau

• "Apparatus for producing high-powered sounds and ultra-sounds" V Gavreau, US Patent US2804042, 1957
• "Dispositif de protection individuelle contre le bruit", V Gavreau, French Patent FR977197, 1951
• "Perfectionnements aux é metteurs d'ultra-sons à solides vibrants", V Gavreau & M Miane, French Patent FR1099035, 1955
• "Perfectionnements aux appareils producteurs de sons et d'ultra sons de grande puissance", V Gavreau, French Patent FR1111527, 1956
• "Générateurs puissants de sons et d'ultra-sons à émetteurs couplés", V Gavreau & A Calaora, French Patent FR1131551, 1957
• "Perfectionnements à la commande automatique de machines industrielles par courants de fréquences audibles ou ultra-sonores", V Gavreau & A Calaora & M Miane, French Patent FR1142019, 1957
• "Perfectionnements à la commande automatique de machines industrielles par courants de fréquences audibles ou ultra-sonores", V Gavreau & A Calaora, French Patent FR1187699, 1959
• "Pistonphones synchronisés", V Gavreau, French Patent FR1437460, 1966. efforts to produce strong infrasound, likely as a weapon.
• "Structures utilisables comme absorbants et isolants acoustiques", V Gavreau & S Henri, French Patent FR1536289, 1967
• "Dust extraction centrifuges" V Gavreau & A Calaora, US Patent US3337126, 1967