Canada Post honors four Canadian inventions including Blackberry

A new series of stamps of Canada Post released on August 17 include four Canadian inventions including BlackBerry. The other Canadian inventions include eclectic oven, cardiac pacemaker, and electric wheelchair. Thomas Ahearn invented the world’s first electric oven in 1892. The cardiac pacemaker was invented by Dr. John Hopps in 1950. George J. Klein invented…

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