CHEMITRON
DEVICES KINEMATICALLY GENERATING VIBRATIONS, OSCILLATIONS, SOUND, AND ULTRASOUND IN THE AIR, IN GASES, AND IN LIQUIDS; AND MACHINE, APPARATUS, AND EQUIPMENT, EQUIPPED WITH SUCH GENERATORS, FOR CHEMICAL AND PHYSICAL PROCESSING AND TREATMENT OF SUBSTANCES AND MIXTURES THEREOF
Expired · March 5, 1963 · 72157662 ·