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| Patents for Benjamin Forstner | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 155,148 | Sep. 22, 1874 | B. Forstner | Forstner Bit | |
 | 280,026 | Jun. 26, 1883 | B. Forstner | Shell Type Bit with Recessed Lip | |
 | 336,709 | Feb. 23, 1886 | B. Forstner | Auger | |
 | CA-23,548 | Mar. 06, 1886 | B. Forstner | Auger | |