US3689931 Centrifugal pumps
Cited prior art · Luis R Pagan Fortis · United States · 1972
Luis R. Pagan Fortis, 1 12 Whitley Drive, Norristown, Pa. 1940 FOREIGN PATENTS OR APPLICATIONS (22 Filed: May 19, 1971 103,660 7|1926 Austria..................... 41.614 (21) Appl. No.: 144,983 Primary Examiner-Henry F. Raduazo 52 U.S. Cl...................