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| Patents for James Hartness | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,874,517 | Aug. 30, 1932 | J. Hartness | Screw Thread Gauging | thread gages | |
| 1,877,307 | Sep. 13, 1932 | J. Hartness | Tolerance zone on gauges | thread gages | |
| 1,905,705 | Apr. 25, 1933 | J. Hartness | Screw Thread Gauge | thread gages | |
| 1,922,849 | Aug. 15, 1933 | J. Hartness | Gauging of Screw Threads | thread gages | |