| Patents for John Du Bois |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 101,238 | Mar. 29, 1870 | J. Du Bois, E.F. Beugler | Improvement in fastening for cutter-heads, pulleys, etc. | cutterheads |
| 165,662 | Jul. 20, 1875 | J. Du Bois | Improvement in spark-arresters | |
| 182,750 | Oct. 03, 1876 | J. Du Bois | Improvement in match-machines | match making machines |
| 191,560 | Jun. 05, 1877 | E.F. Beugler | Improvement in lathe-tools | lathe tools |
| 192,242 | Jun. 19, 1877 | J. Du Bois | Improvement in cutter-heads | cutterheads |
| 196,644 | Oct. 30, 1877 | J. Du Bois | Cutter for Lathes | lathe tools |
| CA-8,491 | Mar. 04, 1878 | J. Du Bois, E.F. Beugler | Improvements in tools for metal working lathes and planers | lathe tools |
| 200,992 | Mar. 05, 1878 | J. Du Bois | Improvement in machines for ripping, surfacing and matching lumber | matchers |
| 215,897 | May 27, 1879 | J. Du Bois | Improvement in machines for sawing box-stuff | box making machines |
| 215,898 | May 27, 1879 | J. Du Bois | Improvement in mills for sawing shingle-bolts | shingle machines |
| 220,062 | Sep. 30, 1879 | J. Du Bois | Improvement in machines for sawing box-stuff | box making machines |
| 306,723 | Oct. 21, 1884 | J. Du Bois | Lathe for Turning Wheels | pulley turning lathes |
