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| Patents for Charles F. Hendrie | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 166,743 | Aug. 17, 1875 | H. Bolthoff | Improvement in wet and dry ore crushers | |
 | 204,945 | Jun. 18, 1878 | H. Bolthoff | Improvement in pulverizing apparatus | |
 | 260,527 | Jul. 04, 1882 | H. Bolthoff | Cam-shaft box for stamp-mills | |
 | 261,297 | Jul. 18, 1882 | H. Bolthoff | Mortar for stamp-mills | |
| 312,956 | Feb. 24, 1885 | H. Bolthoff | Stamp-mill | ||