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4. Argument in behalf of the extension of the patent of B. Frank Palmer for an improvement in artificial legs, dated November 4th. 1846 before the Hon. Philip F. Thomas, Commissioner of Patents: hearing, 22d October, 1860

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9. Vulcanite rubber artificial limbs, arms and legs, moulded from life in form: adjustable sockets, lock-knee joint, slight lateral motion in ankle, corrugated side-knee joint, frictionless toe joint, velvet finish, and warranted of one-third less weight and twice as durable as the best wooden legs in use : without a string or ligament in arm or leg, all levers perfectly water proof

nlm:nlmuid-65170300R-bk