| Patents Granted on 1878-04-__ |
Patents 1 -
15
of 66
      |
| Number | Date | Patentee | Title | Type |
| RE8,150 | Apr. 02, 1878 | W. Lamb | Improvement in log-carriages for saw-mills | sawmill carriages |
| 201,862 | Apr. 02, 1878 | H.G. Ashton | Improvement in Exhaust Mechanisms for Locomotives and Other Steam-Engines | steam safety valves |
| 201,875 | Apr. 02, 1878 | J.C. Estey | Utilizing Power of Water Pipes | turbine water wheels |
| 201,908 | Apr. 02, 1878 | A.E. Brockett | Bung Borer | tapered reamers |
| 201,920 | Apr. 02, 1878 | W.T. Gilliland | Coffee Roaster | coffee roasters |
| 201,932 | Apr. 02, 1878 | J. May | Gauge lathe | wood lathes |
| 201,938 | Apr. 02, 1878 | W.E. Nickerson | Improvement in cutters for reducing bark | bark processing machines |
| 201,948 | Apr. 02, 1878 | M. Rice | Cutting & boring lathe attachment | wood drilling and boring |
| 202,061 | Apr. 02, 1878 | H.L. Shaler | Improvement in Augers | auger bits |
| 202,073 | Apr. 02, 1878 | C.W. Thompson | Improvement in machines for making barrel-hoops | hoop making machines |
| CA-8,625 | Apr. 08, 1878 | I. Fréchette | Improvement in shingle mill | shingle machines |
| CA-8,630 | Apr. 08, 1878 | E.J. Worcester, V.F. Prentice | Machine for grinding cutters of mowers and reapers | sharpening machines |
| RE8,160 | Apr. 09, 1878 | D.C. Prescott | Improvement in direct-acting steam-feed-works for circular-saw mills | circular sawmills |
| RE8,162 | Apr. 09, 1878 | J. Cain | Improvement in head-blocks for saw-mills | sawmill headblocks |
| RE8,164 | Apr. 09, 1878 | G. Rogers | Traction Engines | steam traction engines |
