| Patents for D. L. Johnston |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
 | 109,546 | Nov. 22, 1870 | J.W. Paige, D. Reynolds | Improvement in the manufacture of salt |
 | 115,029 | May 23, 1871 | D. Copeland, Jr. | Improvement in cement-pipe |
 | 115,030 | May 23, 1871 | D. Copeland, Jr. | Improvement in machines for molding drain and sewer pipes |
 | 120,103 | Oct. 17, 1871 | L. Runyon | Improvement in churns |
 | 120,195 | Oct. 24, 1871 | E.W. Herendeen | Improvement in harrows |
 | 121,936 | Dec. 19, 1871 | G.W. Fisher | Improvement in toy monuments |
 | 145,942 | Dec. 30, 1873 | J. Greenwood | Improvement in machines for forcing hoops on barrels |
