| Patents for James Hartness |
Patents 46 -
60
of 94
      |
| Number | Date | Patentee | Title | Type |
| 800,571 | Sep. 26, 1905 | J. Hartness | Balanced Drive for Lathes | metalworking power transmission |
| 832,380 | Oct. 02, 1906 | J. Hartness | Tap and Process of Making the Same | taps and dies |
| 832,381 | Oct. 02, 1906 | J. Hartness | Power Transmitting Mechanism for Metal Working Machines | metalworking power transmission |
| 840,322 | Jan. 01, 1907 | J. Hartness | Lathe Spindle | metal lathes |
| 860,802 | Jul. 23, 1907 | J. Hartness | Turning Tool | lathe tools |
| 870,288 | Nov. 05, 1907 | J. Hartness | Clutch Mechanism | industrial machine clutches |
| 872,233 | Nov. 26, 1907 | J. Hartness | Engine Lathe | engine lathes |
| 872,728 | Dec. 03, 1907 | J. Hartness | Machine for Cutting Screw Threads | metal threading machines |
| 876,305 | Jan. 07, 1908 | J. Hartness | Engine Lathe | engine lathes |
| 877,925 | Feb. 04, 1908 | J. Hartness | Taper Turning Tool | lathe tools |
| 878,203 | Feb. 04, 1908 | J. Hartness | Metal Turning Mechanism | metal lathe accessories and attachments |
| 912,676 | Feb. 16, 1909 | J. Hartness | Metal Working Machine | multiple spindle lathes |
| 985,411 | Feb. 28, 1911 | J. Hartness | Work Supporting Rest for Turning Tools | lathe tool holders and tool posts |
| 1,020,493 | Mar. 19, 1912 | J. Hartness | Turning Tool | lathe tools |
| 1,020,494 | Mar. 19, 1912 | J. Hartness | Turning Tool | lathe tools |
