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| Patents for Lewis C. Heermann | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 419,884 | Jan. 21, 1890 | F.H. Richards | Milling-machine vise | |
 | 421,517 | Feb. 18, 1890 | F.H. Richards | Drilling Machine | |
| 440,740 | Nov. 18, 1890 | F.H. Richards, C.H. Cooley | Scale-beam for grain-weighers | ||
 | 441,199 | Nov. 25, 1890 | S.D. Shambarger | Wrench | |
| 442,720 | Dec. 16, 1890 | F.H. Richards | Grain-weigher | ||
| 443,569 | Dec. 30, 1890 | C.H. Cooley | Grain-weigher | ||
| 443,718 | Dec. 30, 1890 | F.H. Richards | Grain-weigher | ||
| 443,933 | Dec. 30, 1890 | F.H. Richards, C.H. Cooley | Grain-weigher | ||