Liquid Level Indicator Pioneer Instrument Co. Inc. Original Patent Lithograph 1932
On this original linen-backed lithograph from 1932 (includes original specification sheet), Pioneer Instrument Company Incorporated patented improvements in liquid level indicating devices.The Pioneer Instrument Company was started by Morris Maxey Titterington and Brice Herbert Goldsborough in Brooklyn, New York in 1919. Charles Herbert Colvin was the president. They specialized in aeronautical instruments including a bubble sextant and the Earth Inductor Compass. The company later acquired control of Brandis & Sons, Inc., in 1922, and Pioneer was later acquired by the Bendix Aviation Corporation in 1928. As the United States was entering World War II, the company became the Pioneer Instrument Division of Bendix Aviation, and moved to New Jersey. By 1943 it had become the Eclipse-Pioneer Division of Bendix Aviation.
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These are the original lithographs found in books obtained from the Patent and Trademark Office directly.
In the 1800's and early 1900's, inventors would submit a detailed drawing of the invention and/or improvements to the patent and trademark office. Once received and if approved, the Patent office would then send a letter of confirmation to the inventor and begin to take that drawing and etch it into stone in order to create and print this linen-backed lithograph. These documents are the original hard copies that were created by the patent office's artists, and act as patent examiner reference material. With that being said, these are 100% original and are the only physical copies in existence.
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