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| Patents for Alfred P. Albrecht | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,193,917 | Mar. 19, 1940 | A.P. Albrecht, A.R. Bone | Bit Extension | |
 | 2,215,344 | Sep. 17, 1940 | A.P. Albrecht | Micro Dial | |