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| Patents for William H. Horstmann | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 22,849 | Feb. 08, 1859 | H.J. Behrens | Billiard-register | |
 | 39,923 | Sep. 15, 1863 | H.J. Behrens, W.H. Horstmann | Improvement in machines for making cartridges | |