In 1957, the analytical plotter,
a 3d map making system was invented by Canadian, Uno Vilho Helava.
In 1950, the heart pacemaker
was invented by Canadian, Doctor John Hopps.
In 1941, the anti-gravity
suit was invented by Canadian, Wilbur Rounding Franks.
In 1931, plexiglas or polymerized methyl methacrylate was invented by Canadian, William Chalmers.
