| Patents for John C. Langdon |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| FX-3,112 | Jun. 05, 1819 | J.C. Langdon, B. Langdon | Propelling boats by horse power | nautical propulsion apparatus |
| 3,760X | Sep. 26, 1823 | J. Trash, J.C. Langdon | Machine for grinding grain | miller |
| 5,457X | Apr. 18, 1829 | J.C. Langdon, A. Salisbury | Machine for Breaking Flax and Hemp | flax and hemp machines |
| 5,590X | Jul. 29, 1829 | A. Salisbury, J.C. Langdon | Breaking and Dressing Hemp and Flax | flax and hemp machines |
| 286 | Jul. 19, 1837 | B. Langdon | Mode of applying horse or other animal power to propelling machinery | animal powered apparatus |
| 555 | Jan. 09, 1838 | B. Langdon | Machine for planing plank boards and clapboards | wood planers |
| 556 | Jan. 09, 1838 | B. Langdon | Machine for planing shingles | shingle machines |
| 2,689 | Jun. 22, 1842 | B. Langdon | Improvement in plows | plows |
