Patent US2109963 Apparatus for supplying gas to internal combustion engines Cited prior art · Alvin H Kruse · United States · 1938 A gs Alvin Hitruse Los oy GDomoe Uofehion, Nyman Bh "Aiemey i Page 2 : APPARATUS FOR SUPPLYING GAS. TO INTERNAL COMBUSTION ENGINES Filed Aug. 13, 1936