| Patents for Hench & Dromgold Co. |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 310,821 | Jan. 13, 1885 | W.A. Dromgold, S.N. Hench | Cultivator spring-hoe | cultivators and tillers |
| 348,208 | Aug. 31, 1886 | W.A. Dromgold, S.N. Hench | Cultivator | cultivators and tillers |
| 402,079 | Apr. 23, 1889 | W.A. Dromgold, S.N. Hench | Spring-tooth harrow | harrows |
| 419,990 | Jan. 21, 1890 | W.A. Dromgold, S.N. Hench | Spring-tooth harrow | harrows |
| 488,906 | Dec. 27, 1892 | W.A. Dromgold, S.N. Hench, J.N. Richey | Sawmill-dog | sawmill dogs |
| 491,447 | Feb. 07, 1893 | S.N. Hench, E.A. Reese, W.A. Dromgold | Mechanism for operating sawmill-carriages | sawmill carriages |
| 491,494 | Feb. 07, 1893 | W.A. Dromgold, S.N. Hench, J.N. Richey | Mechanism for operating sawmill-carriages | sawmill carriages |
| 540,618 | Jun. 04, 1895 | W.A. Dromgold, S.N. Hench | Harrow | harrows |
| 555,699 | Mar. 03, 1896 | W.A. Dromgold, S.N. Hench | Harrow | harrows |
| 1,226,450 | May 15, 1917 | W.W. Birnstock | Cultivator | cultivators and tillers |
| 1,259,348 | Mar. 12, 1918 | W.W. Birnstock, C.W. Vogel | Bottle-crate | |
| 1,324,580 | Dec. 09, 1919 | W.W. Birnstock | Bottle-crate | |
| 1,349,144 | Aug. 10, 1920 | W.W. Birnstock | Nozzle-header for bottle-washing machines | |
