| Patents for John G. Hey |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 945,326 | Jan. 04, 1910 | J.G. Hey | Belt-tightener | drill presses |
| 1,148,677 | Aug. 03, 1915 | J.G. Hey | Belt-gearing for drill-presses and the like | drill presses |
| 1,173,189 | Feb. 29, 1916 | J.G. Hey | Belt-gearing | metalworking power transmission |
| 1,216,689 | Feb. 20, 1917 | J.G. Hey | Feed mechanism for drilling-machines | drill presses |
| 1,363,786 | Dec. 28, 1920 | J.G. Hey | Belt-gearing for drill-presses | drill presses |
| 1,977,061 | Oct. 16, 1934 | J.G. Hey | Drilling machine and the like | drill presses |
