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>> Boentgen & Sabin, 1880
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Boentgen & Sabin, 1880
This is a German Patent
Patent_B&S_1.jpg
B&SPat3.jpg
Figures
B&SPat3A.jpg
B&SPat3B.jpg
B&SPat2B-2.jpg
B&SPat2A-2.jpg
B&SPat2A.jpg
B&SPat2B.jpg
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