James Paris Lee of Galt (Cambridge) is known for his part in inventing the Lee-Metford and Lee-Enfield Rifles. The question remains if he had a role in inventing the Remington typewriter. The company that made Lee's rifles also made Remington Typewriters. While he's not officially recognized, it's believed that he may have been involved. Often only the main contributors to an idea receive credit even though countless minds are involved.
Dawson’s Golden Chaff
In 1881, Robert Dawson identified and propagated a hearty winter wheat which is still used today
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How Canada's IMAX went from a high-school lab to 1,000 theatres worldwide
Science teacher Gordon Clark gave three of his students the run of the high-school lab after hours in the 1940s, he would have had no idea that they would come up with one of the biggest innovations.