| Patents for H. E. Metcalf |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 147,654 | Feb. 17, 1874 | S.R. Kneeland | Improvement in Screwdriver blades | screwdriver blades |
| 151,955 | Jun. 16, 1874 | A.D. Bourne | Wagon-Wrenches | axle nut wrenches that lock nut to wheel hub |
| 157,102 | Nov. 24, 1874 | W.F. Patterson | Improvement in Screw-Drivers | screwdriver blades |
| 158,807 | Jan. 19, 1875 | W.F. Patterson | Improvement in Screw-Drivers | screwdriver blades |
| 174,778 | Mar. 14, 1876 | G.H. Buzzell | Pipe-Tongs | pipe tongs |
| 273,266 | Mar. 06, 1883 | H.W. Eskildson | Hoop-cutting machine | hoop making machines |
| 284,702 | Sep. 11, 1883 | J. Wyke | Screw-Cutting Gage | measurement gauges |
| 285,115 | Sep. 18, 1883 | E.L. Conkey | Center-rest for lathes | wood lathes |
