Inventions Made by Employes do not Belong t the Employer. Impure Ice as a Cause of Disease. Hilborne L. Roosevelt. George Crompton., scientific american, 1887-01-22

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Inventions Made by Employes do not Belong t the Employer. Impure Ice as a Cause of Disease. Hilborne L. Roosevelt. George Crompton., scientific american, 1887-01-22

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