Scope and Contents Articles and a patent authored by Thomas M. Gardner, along with two land deeds.

Scope and Contents The papers consist of ten patents/inventions by Robert Hofstetter.

Scope and Contents The papers of Benjamin Miessner. Correspondence, patents, photographs, and clippings documenting the engineering and inventing career of Benjamin F. Miessner. Miessner was a pioneer researcher in electronic musical instruments and receivers, phonography, radio dynamics, directional microphones for aircraft and submarines, and aircraft radio. At the time of his retirement in 1959 Miessner had been granted over 200 patents in the U.S. and foreign countries. He also perfected the Wurlitzer organ...

Scope and Contents The Theodore Morris papers document the education and professional work of 1906 Purdue graduate Theodore Morris. The papers include his mechanical engineering assignments, engineering and metallurgy notebooks, and documentation related to his 1934 patent for an "Aggregate Treating Apparatus" for use in "drying sand, stone, and other mineral aggregate for use with asphaltic cement and other bituminous materials for paving purposes."