Rotary Mechanical Pumps Of The Screw Type

Wycliffe , et al. July 18, 1

Patent Grant 3677664

U.S. patent number 3,677,664 [Application Number 05/050,049] was granted by the patent office on 1972-07-18 for rotary mechanical pumps of the screw type. This patent grant is currently assigned to Edwards High Vacuum International Limited. Invention is credited to Basil Dixon Power, Henryk Wycliffe.


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