| Patents for John Du Bois |
Patents 1 -
10
of 12
      |
| Picture | Number | Date | Patentee | Title |
 | 101,238 | Mar. 29, 1870 | J. Du Bois, E.F. Beugler | Improvement in fastening for cutter-heads, pulleys, etc. |
 | 165,662 | Jul. 20, 1875 | J. Du Bois | Improvement in spark-arresters |
 | 182,750 | Oct. 03, 1876 | J. Du Bois | Improvement in match-machines |
 | 191,560 | Jun. 05, 1877 | E.F. Beugler | Improvement in lathe-tools |
 | 192,242 | Jun. 19, 1877 | J. Du Bois | Improvement in cutter-heads |
| | 196,644 | Oct. 30, 1877 | J. Du Bois | Cutter for Lathes |
 | CA-8,491 | Mar. 04, 1878 | J. Du Bois, E.F. Beugler | Improvements in tools for metal working lathes and planers |
 | 200,992 | Mar. 05, 1878 | J. Du Bois | Improvement in machines for ripping, surfacing and matching lumber |
 | 215,897 | May 27, 1879 | J. Du Bois | Improvement in machines for sawing box-stuff |
 | 215,898 | May 27, 1879 | J. Du Bois | Improvement in mills for sawing shingle-bolts |
