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| Patents for Albert Holbrook | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 141,930 | Aug. 19, 1873 | A. Holbrook | Improvement in Mallets | |
 | 177,397 | May 16, 1876 | A. Holbrook | Improvement in Mallets | |
 | 192,867 | Jul. 10, 1877 | A. Holbrook | Improvement in Mallets | |