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Patents for E. Schaferr | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 40,650 | Nov. 17, 1863 | I. Straub, A. Straub | Improved artificial variegated marble | |
![]() | 40,651 | Nov. 17, 1863 | I. Straub, A. Straub | Improved asphaltic paving or flag stone |