| Patents for James Hartness |
Patents 1 -
15
of 94
      |
| Number | Date | Patentee | Title | Type |
| 392,425 | Nov. 06, 1888 | J.J. Tower, J. Hartness | Carpenter's Plane | plane cap irons |
| 409,786 | Aug. 27, 1889 | J. Hartness | Turret Lathe Having a Supplemental Drill Spindle | horizontal drilling machines |
| 412,027 | Oct. 01, 1889 | E.F. Spaulding, J. Hartness | Lathe Chuck | metal lathe chucks |
| 424,979 | Apr. 08, 1890 | J. Hartness | Screw Machine Tool | screw machines |
| 431,809 | Jul. 08, 1890 | J. Hartness | Attachment for Metal Screw Machines | metal lathe accessories and attachments |
| 441,411 | Nov. 25, 1890 | J. Hartness | Stock Feeding Device for Screw Machines | workpiece changers and storage mechanisms |
| 451,711 | May 05, 1891 | J. Hartness | Chuck | metal lathe chucks |
| 457,967 | Aug. 18, 1891 | J. Hartness | Machine for Making Screws | screw machines |
| 467,097 | Jan. 12, 1892 | J. Hartness | Belt Shipper | industrial machine pulleys and belt drive mechanisms |
| 467,098 | Jan. 12, 1892 | J. Hartness | Stock Feeding Device for Screw Machines | workpiece changers and storage mechanisms |
| 501,273 | Jul. 11, 1893 | J. Hartness | Tool for Turning Tapering Surfaces | lathe tools |
| 510,020 | Dec. 05, 1893 | J. Hartness | Screw Machine | screw machines |
| 529,169 | Nov. 13, 1894 | J. Hartness | Screw Cutting Die | tap and die holders |
| 541,483 | Jun. 25, 1895 | J. Hartness | Fluid Controlled Clutch and Speed Regulator | metalworking variable speed mechanisms |
| 543,551 | Jul. 30, 1895 | J. Hartness | Metal Reducing Tool | lathe tools |
