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Testimony in the matter of the application of B. Frank. Palmer for the extension of his patent for an artificial leg: read before the Hon. Commissioner of Patents, October 22, 1860 : extension granted Nov. 3, 1860
Testimony in the matter of the application of B. Frank. Palmer for the extension of his patent for an artificial leg: read before the Hon. Commissioner of Patents, October 22, 1860 : extension granted Nov. 3, 1860