Find number abc
If c0ba9 + b6970 = 117799 find number abc. Multiple solutions may exist.Correct answers: 44
The first user who solved this task is Djordje Timotijevic.
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U.S. patent issued to boyIn 1988, a U.S. patent was issued to 11-year-old Richard G. Woodbridge for the brush he designed to clean out sawdust accumulating in chain saw cuts to avoid sawdust build-up that otherwise can cause the chain saw to jam (No. 4,748,745). The brush is stationary, mounted on two brackets above to the chain saw blade, and is used by turning the chain saw upside down and moving the bristles through the saw cut. He was inspired by the bristles along the back of windshield snow scrapers. As the son of patent attorney Richard C. Woodbridge the boy had help in adding an optional brush agitator that would tranfer vibrations from the chain to the brush to improve the sawdust removal rate.« |