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| Patents for Frank Bartz | |||||
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| Number | Date | Patentee | Title | Type | |
| 874,924 | Dec. 31, 1907 | F. Bartz, F.A. Wygant | Receptacle for coffee-mills | coffee mills | |
| 874,925 | Dec. 31, 1907 | F. Bartz, F.A. Wygant | Coffee-mill | coffee mills | |
| 930,920 | Aug. 10, 1909 | F. Bartz | Meat-cutter | meat grinders | |
| 930,921 | Aug. 10, 1909 | F. Bartz | Meat-cutter | meat grinders | |
| 953,250 | Mar. 29, 1910 | F. Bartz | Coffee-mill | coffee mills | |