<Li> Karl Guthe Jansky (1905--1950), USA--radio telescope </Li> <Li> Karl Jatho (1873--1933), Germany--aeroplane </Li> <Li> Ali Javan (1926--2016), together with William R. Bennett Jr. (1930--2008), Iran / USA--Gas laser (Helium - Neon) </Li> <Li> Al - Jazari (1136--1206), Iraq--crank - driven and hydropowered saqiya chain pump, crank - driven screw and screwpump, elephant clock, weight - driven clock, weight - driven pump, reciprocating piston suction pump, geared and hydropowered water supply system, programmable humanoid robots, robotics, hand washing automata, flush mechanism, lamination, static balancing, paper model, sand casting, molding sand, intermittency, linkage </Li>

List of inventors and their inventions with year