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| title = Canadian Scientists and Inventors ...of kerosene can have a major political and environmental consequence. The Indian government subsidizes the fuel to keep the price very low, to around 15 cen

...nd [[aconitum]]. Circa 400 BC, the [[Sushruta Samhita]] (a text from the [[Indian subcontinent]] on [[Ayurveda|ayurvedic medicine]] and surgery) advocates th ...for the discovery of thiopental, and they were inducted into the National Inventors Hall of Fame in 1986.

...|first=Mary |last=Bellis |publisher=About.com |accessdate=2008-08-09 |work=Inventors}}</ref> ...produced smoother ice cream than the pot freezer and did it quicker. Many inventors patented improvements on Johnson's design.