| All Patents in class 440/48 |
Patents 1 -
6
of 6
      |
| Picture | Number | Date | Patentee | Title |
| | 5,733X | Nov. 30, 1829 | J. Perkins | Paddle wheels |
| | 9,111X | Sep. 18, 1835 | J.L. Smith | Propelling boats by a screw in still water |
| | 9,256X | Nov. 23, 1835 | E.P. Fitzpatrick | Screw for propelling boats (Boat, screw) |
| | 9,386X | Feb. 12, 1836 | E.P. Fitzpatrick | Boat construction |
 | 9,485X | Mar. 08, 1836 | A.A. Wilder | Propelling wheel |
 | 2,400 | Dec. 23, 1841 | T.J. Wells | Improvement in the manner of constructing and of propelling steamboats, denominated the "buoyant spiral propeller" |
