| Patents for James Hartness |
Patents 16 -
30
of 94
      |
| Number | Date | Patentee | Title | Type |
| 556,415 | Mar. 17, 1896 | J. Hartness | Turret Lathe | turret lathes |
| 565,746 | Aug. 11, 1896 | J. Hartness | Screw Cutting Die | taps and dies |
| 579,570 | Mar. 30, 1897 | E.R. Fellows | Cutter and cutter-head for gear-shaping machine | gear making machines |
| 587,480 | Aug. 03, 1897 | J. Hartness | Attachment for Turret Lathes | metal lathe accessories and attachments |
| 596,750 | Jan. 04, 1898 | J. Hartness | Screw Cutting Attachment | turret lathes |
| 614,949 | Nov. 29, 1898 | J. Hartness | Screw Cutting Die | taps and dies |
| 629,161 | Jul. 18, 1899 | J. Hartness | Stock Feeding Mechanism for Screw Machines | workpiece changers and storage mechanisms |
| 635,887 | Oct. 31, 1899 | J. Hartness | Turret Lathe | turret lathes |
| 635,888 | Oct. 31, 1899 | J. Hartness | Turret Lathe | turret lathes |
| 637,461 | Nov. 21, 1899 | J. Hartness | Fluid Operated Lathe | metal lathes |
| 638,578 | Dec. 05, 1899 | J. Hartness | Box Slide Forming Tool | lathe tools |
| 672,398 | Apr. 16, 1901 | J. Hartness | Lathe | automatic lathes |
| 672,399 | Apr. 16, 1901 | J. Hartness | Tool Holder | lathe tool holders and tool posts |
| 696,634 | Apr. 01, 1902 | J. Hartness | Chuck | metal lathe chucks |
| 700,644 | May 20, 1902 | J. Hartness | Fluid Regulating Device | hydraulic apparatus |
