| Patents for James Hartness |
Patents 76 -
90
of 94
      |
| Number | Date | Patentee | Title | Type |
| 1,084,546 | Jan. 13, 1914 | J. Hartness | Chuck | metal lathe chucks |
| 1,090,300 | Mar. 17, 1914 | J. Hartness | Variable Speed Mechanism for Metal Working Machines | metalworking variable speed mechanisms |
| 1,130,274 | Mar. 02, 1915 | J. Hartness | Metal-turning tool | metal lathe accessories and attachments |
| 1,130,275 | Mar. 02, 1915 | J. Hartness | Metal-turning tool | metal lathe accessories and attachments |
| 1,130,276 | Mar. 02, 1915 | J. Hartness | Automatic chucking-lathe | metal lathes |
| 1,130,277 | Mar. 02, 1915 | J. Hartness | Multispindle lathe | multiple spindle lathes |
| 1,198,632 | Sep. 19, 1916 | J. Hartness | Metal Working Machine | automatic lathes |
| 1,377,068 | May 03, 1921 | J. Hartness | Process of Inspecting and Gaging Screw Threads | thread gages |
| 1,377,069 | May 03, 1921 | J. Hartness | Mechanism for Gaging Screw Threads | |
| 1,480,390 | Jan. 08, 1924 | J. Hartness | Apparatus for Inspecting and Gauging Screw Threads | |
| 1,703,933 | Mar. 05, 1929 | J. Hartness | Optical Comparator | comparators |
| 1,704,741 | Mar. 12, 1929 | J. Hartness | Automatic Die | taps and dies |
| 1,714,780 | May 28, 1929 | J. Hartness | Gauge for Screw Threads | thread gages |
| 1,745,537 | Feb. 04, 1930 | J. Hartness | Cradle Carriage for Comparators | comparators |
| 1,829,797 | Nov. 03, 1931 | J. Hartness | Thread Gauging | thread gages |
