| Patents for Square Hole Auger Co. |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 307,065 | Oct. 21, 1884 | J. Oppenheimer | Mortising machine | portable timber mortisers |
| CA-21,971 | Jul. 02, 1885 | J. Oppenheimer | Mortising machine | portable timber mortisers |
| RE10,655 | Oct. 27, 1885 | J. Oppenheimer | Mortising-machine | mortising machines |
| 339,195 | Apr. 06, 1886 | J.C. Lake, A.E. Lake | Hand-crank chain mortising machine for timbers | human powered machines |
| 377,199 | Jan. 31, 1888 | R. Hughes, A.E. Lake, J.C. Lake | Square-hole auger | portable timber mortisers |
