| Patents for Hart Mfg. Co. |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
 | 41,742 | Feb. 23, 1864 | H.K. Jones | Improvement in Machines for Stamping Carpenters' Squares |
| | 126,307 | Apr. 30, 1872 | H.K. Jones | Improvement in Marking Carpenter Squares |
 | 147,008 | Feb. 03, 1874 | H.K. Jones | Improvement in Machines for Marking Carpenters' Squares |
 | 263,402 | Aug. 29, 1882 | C. Hart | Die Stock for Cutting Threads |
| | 925,100 | Jun. 15, 1909 | L.F. Hart | Screw Cutting Device |
| | 925,181 | Jun. 15, 1909 | L.F. Hart | Screw Cutting Device |
| | 962,024 | Jun. 21, 1910 | L.F. Hart | Screw Cutting Device |
