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US Patent: 1,463,305
Pumping apparatus
Alonzo Galloway Decker - Baltimore, MD
Samuel Duncan Black - Baltimore, MD

USPTO Classifications:
417/372, 74/605, 92/157, D15/7

Tool Categories:

Maryland Trust Co. - Baltimore, MD

Black & Decker Manufacturing Co. - Towson, MD

D. G. Caywood
O. W. Dieffenbach

Patent Dates:
Applied: Jul. 23, 1919
Granted: Jul. 31, 1923

Patent Pictures:
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"Vintage Machinery" entry for Black & Decker Manufacturing Co., Ltd.
Of interest because it is an early patent to Mr. Black and Mr. Decker. The patent is assigned, by mesne assignments, to the Maryland Trust Co. It is likely that the original work was done for the first, Baltimore-based, incarnation of Black & Decker, which appears to have encountered financial difficulties and been reborn a couple of years later as a Towson-based business.

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