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| Patents for William H. Horstmann | |||||
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| Number | Date | Patentee | Title | Type | |
| 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 | cartridges | |