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Patents for Maryland Trust Co. | |||||
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Number | Date | Patentee | Title | Type | |
1,463,305 | Jul. 31, 1923 | S.D. Black, A.G. Decker | Pumping apparatus | ||
1,492,095 | Apr. 29, 1924 | S.D. Black, A.G. Decker | Electrically-driven tool | handheld power tools |