| Patents for Benjamin W. Hoffman |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 162,101 | Apr. 13, 1875 | G.H. Reynolds | Valve Gear for Steam Engines | steam engine valve gear |
| 168,215 | Sep. 28, 1875 | H.J. Behrens | Improvement in valve-gears | steam engine valve gear |
| 170,861 | Dec. 07, 1875 | W.R. Landfear | Improvement in lathes for turning spools | spool or bobbin machines |
| 173,319 | Feb. 08, 1876 | R. McChesney | Improvement in scroll-sawing machines | scrollsaws |
| 179,281 | Jun. 27, 1876 | H. Dinning | Pliers for Securing Eyelet-Hooks in Leather | pliers |
| 185,301 | Dec. 12, 1876 | A. Vivarttas, A. Crosby | Propelling and steering vessels | boats and ships |
| 188,533 | Mar. 20, 1877 | L.H. Olmsted | Improvement in lamps | lamps |
| 190,069 | Apr. 24, 1877 | L.H. Olmsted | Improvement in lamps | lamps |
| 195,997 | Oct. 09, 1877 | C. Elterich | Improvement in drill-chucks | drill chucks |
| 196,188 | Oct. 16, 1877 | W.E. Brock | Improvement in Combined Bevel, Square, Compass, Calipers, &c. | combination tools |
| 196,205 | Oct. 16, 1877 | C. Elterich, A.H. Briggs | Improvement in drill-chucks | drill chucks |
| 207,113 | Aug. 20, 1878 | C. Elterich, A.H. Briggs | Improvement in drill-chucks | drill chucks |
