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| Patents for L. C. Heermann | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 403,988 | May 28, 1889 | C.H. Cooley | Automatic Grain Scales | |
| 421,773 | Feb. 18, 1890 | T.L. Smith | Screw Cutting Die | ||
| 442,711 | Dec. 16, 1890 | F.H. Richards | Regulator for grain-scales | ||
| 442,859 | Dec. 16, 1890 | F.H. Richards, C.H. Cooley | Grain-weigher | ||
| 442,860 | Dec. 16, 1890 | F.H. Richards, C.H. Cooley | Grain-weigher | ||
| 442,861 | Dec. 16, 1890 | F.H. Richards, C.H. Cooley | Grain-weigher | ||