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John Emmett Lawrence
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Individual
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Individual
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24,330. Lawrence, J. E. Oct. 21. Friction gearing. -Both wheels are grooved and have adjustable flanges ; one of them is fitted with hoops or rings of hemp rope or the like which form its acting surfaces.
GB189724330D1897-10-211897-10-21Friction Pulleys for Transmitting Power.
ExpiredGB189724330A
(en)