| Patents for John E. Hall |
Patents 1 -
15
of 25
      |
| Number | Date | Patentee | Title | Type |
| 68,588 | Sep. 03, 1867 | S. Darling | Inkstand | draftsman |
| 73,082 | Jan. 07, 1868 | S. Darling | Straight Edge | graduated rules |
| 73,956 | Feb. 04, 1868 | S. Darling | Improved Pen Cleaner | draftsman |
| 73,957 | Feb. 04, 1868 | S. Darling | Improved Gas Heater | blacksmith |
| RE2,869 | Feb. 18, 1868 | S. Darling | Improvement in the Manufacture of Metallic Squares | try squares |
| 76,409 | Apr. 07, 1868 | S. Darling | Improvement in inkstands | draftsman |
| 76,410 | Apr. 07, 1868 | S. Darling | Vise Handle Holder | bench vises |
| 76,719 | Apr. 14, 1868 | J.E. Hall, S. Darling | Improvment in Inkstands | draftsman |
| 156,840 | Nov. 17, 1874 | S. Darling | Inkstands | draftsman |
| RE6,443 | May 25, 1875 | S. Darling | Improvment in Inkstands | draftsman |
| 164,721 | Jun. 22, 1875 | S. Darling | inkstand | draftsman |
| RE6,574 | Aug. 03, 1875 | S. Darling | Improvment in Inkstands | draftsman |
| 226,162 | Apr. 06, 1880 | S. Darling | Compensating Errors in Screw Dividing Engines | indexers and dividers |
| 227,962 | May 25, 1880 | S. Darling | Dividing Engine | |
| 230,619 | Aug. 03, 1880 | S. Darling | Graduated Measuring Rule | rules |
