| All Patents of Type: bridges |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 57X | Feb. 02, 1793 | R. Leslie | Construction and tone of bells | bridges |
| 58X | Feb. 28, 1793 | R.R. Saltonstall | Manufacturing rhus or sumach | bridges |
| 62X | May 01, 1793 | R.R. Saltonstall | Manufacturing rhus or sumach | bridges |
| 75X | Mar. 31, 1794 | J. Biddis | Improvement in manufacturing paper | bridges |
| 81X | Jun. 16, 1794 | G. Parkinson | Manufacturing cordage | bridges |
| 281X | Apr. 07, 1800 | C. Hoyt, Jr. | Machine for manufacturing sumack | bridges |
| 8,713 | Feb. 03, 1852 | A. White | Wooden suspension bridge | bridges |
| 187,513 | Feb. 20, 1877 | E.E. Colby | Improvement in bridges | bridges |
