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| Patents for Du Bois & Beugler | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 101,238 | Mar. 29, 1870 | J. Du Bois, E.F. Beugler | Improvement in fastening for cutter-heads, pulleys, etc. | |
 | 191,560 | Jun. 05, 1877 | E.F. Beugler | Improvement in lathe-tools | |
 | CA-8,491 | Mar. 04, 1878 | J. Du Bois, E.F. Beugler | Improvements in tools for metal working lathes and planers | |