Box D-2-1
Contains 496 Results:
Letter to George E. Nerney from H. H. Laughlin, 1927 September 17.
Includes replies from patent-holders with genealogical information about their families.
Letter to William E. Williams from H. H. Laughlin, 1927 September 17.
Includes replies from patent-holders with genealogical information about their families.
Letter to H. H. Laughlin from O. A. Rosbow, Vapor Car Heating Co., 1927 September 21.
Patent 1.617.589.
Letter to H. H. Laughlin from C. S. Schairer per E. E. Little, Westinghouse Electric & Manufacturing Company, 1927 September 17.
Includes replies from patent-holders with genealogical information about their families.
Letter to H. H. Laughlin from Harry A. Davis, 1927.
List of patent numbers included in letter.
Letter to H. H. Laughlin from H. Gernsback, 1927 October 13.
Includes replies from patent-holders with genealogical information about their families.
Letter to "Dear Sir" from Henry Faurot, 1927 October 21.
Includes replies from patent-holders with genealogical information about their families.
Letter to H. H. Laughlin from E. L. Ives, H. A Brassert & Company, 1927 October 24.
Includes replies from patent-holders with genealogical information about their families.
Letter to H. H. Laughlin from Archie Fahnestock, Fahnestock Electric Co., 1927 October 25.
Includes replies from patent-holders with genealogical information about their families.
Letter to H. H. Laughlin from William Brown, 1927 October 26.
Includes replies from patent-holders with genealogical information about their families.