| Patents for Hart Mfg. Co. |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 41,742 | Feb. 23, 1864 | H.K. Jones | Improvement in Machines for Stamping Carpenters' Squares | tool making machines |
| 126,307 | Apr. 30, 1872 | H.K. Jones | Improvement in Marking Carpenter Squares | making squares |
| 147,008 | Feb. 03, 1874 | H.K. Jones | Improvement in Machines for Marking Carpenters' Squares | tool making machines |
| 925,100 | Jun. 15, 1909 | L.F. Hart | Screw Cutting Device | tap and die holders |
| 925,181 | Jun. 15, 1909 | L.F. Hart | Screw Cutting Device | tap and die holders |
| 962,024 | Jun. 21, 1910 | L.F. Hart | Screw Cutting Device | pipe threading machines |
