1
Rene J Perdreaux Jr: Ultrasonic device and method. Cavitron Corporation, Philip H Pohl, Philip Sperber, May 18, 1976: US03956826 (195 worldwide citation)

An ultrasonic hand-held cleaning device having a housing enclosing a casing, an energyzing winding about the casing, and a fluid conduit attached to the interior of the casing. A sleeve is insertably mounted into the end of the casing, and acts to support a connecting body at a spaced distance withi ...


2
James W Mahaffey, Charles J Ziegler: Ultraviolet light applicator. Cavitron Corporation, Philip H Pohl, Philip Sperber, July 20, 1976: US03970856 (56 worldwide citation)

A handheld ultraviolet light applicator and power circuit for dental use is disclosed having a U-shaped argon filled glass ultraviolet lamp enclosed in a flat or curved lens and attached to a handle. Lamp excitation is supplied through a shielded cable from a power source having a high reactance tra ...


3
Martin A Damast, Vincent P Abberton, Kusler Celestin: Ultrasonic cutting apparatus. Cavitron Corporation, Philip H Pohl, Philip Sperber, January 27, 1976: US03934526 (7 worldwide citation)

An ultrasonic cutting apparatus comprising a tuning fork or U-shaped flexural member having legs on which cutting means are mounted, and an ultrasonic drive connected to the flexural member for inducing ultrasonic vibrations in the flexural member. Also disclosed herein is an ultrasonic drive member ...


4
Charles E Cole, Terry L Ramsey: Method of producing crude oil. Cities Service Oil Company, Philip H Pohl, Alvin H Fritschler, February 23, 1971: US3565172 (2 worldwide citation)

A method for efficiently producing hydrocarbons such as petroleum and similar fluids from an underground reservoir having several separated and different hydrocarbon bearing formations or zones in stratified sequence is disclosed herein. The method comprises boring a generally vertical hole through ...