Click on a patent name to download the PDF file of that patent.
In addition, a 4mb ZIP file is available that contains a bunch of patents (in PDF format) retrieved during a search on Google for "Improvement in Bridges." This random collection of bridge patents will be of interest to those wishing to see patents for bridge designs that have long since been demolished, or even for patented designs which were never built.
Also, for further detail and research, a detailed report was written by David Guise to outline truss bridge patents. It is an extensive and useful resource.
| Patent | Inventor | Bridge Company (Most Closely Associated) | Date | Number | Significance |
| Thomas Moseley Bowstring Bridge Patent 1857 | Thomas Moseley | Moseley Iron Building Works of Boston, Massachusetts | February 3, 1857 | 16572 | Outlines distinctive details in remaining Moseley bowstring truss bridges. |
| Thomas Moseley Bowstring Bridge Patent 1866 | Thomas Moseley | Moseley Iron Building Works of Boston, Massachusetts | October 23, 2866 | 59054 | Outlines distinctive details in remaining Moseley bowstring truss bridges. |
| Thomas Moseley Bowstring Bridge Patent 1870 | Thomas Moseley | Moseley Iron Building Works of Boston, Massachusetts | May 31, 1870 | 103765 | Outlines distinctive details in remaining Moseley bowstring truss bridges. |
| David Hammond Bowstring Patent 1873 | David Hammond | Wrought Iron Bridge Company of Canton, Ohio | February 11, 1873 | 135802 | Describes the unique construction details of a Wrought Iron Bridge Company bowstring. |
| Bottom Chord Connection Detail | F. C. Lowthorp | June 30, 1857 | 17684 | F. C. Lowthorp | |
| Cast Iron Diagonal and Vertical Member Intersection | F. C. Lowthorp | February 19, 1867 | 62278 | F. C. Lowthorp | |
| Wrought Iron Bridge Company Bowstring Patent 1876 | Job Abbott | Wrought Iron Bridge Company of Canton, Ohio | November 21, 1876 | 184490 | Describes the unique construction details of a Wrought Iron Bridge Company bowstring. |
| Wrought Iron Bridge Company 1876 Truss Bridge Patent | David Hammond | Wrought Iron Bridge Company of Canton, Ohio | November 21, 1876 | 184520 | Describes the unique construction details of one of the earliest Wrought Iron Bridge Company trapezoidal truss bridges. |
| Wrought Iron Bridge Company Wrought Iron Girder 1876 Patent | David Hammond | Wrought Iron Bridge Company of Canton, Ohio | November 21, 1876 | 184522 | Describes the unique construction details of the earliest Wrought Iron Bridge Company built-up beams. |
| Wrought Iron Bridge Company Wrought Iron Post 1876 Patent | David Hammond | Wrought Iron Bridge Company of Canton, Ohio | November 21, 1876 | 184521 | Describes the unique construction details of the earliest Wrought Iron Bridge Company built-up beams. |
| Strauss Bascule Bridge Patent | Joseph Strauss | Strauss Bascule Bridge Company | June 20, 1911 | 995813 | Outlines the key features in a "Strauss type" bascule bridge. |
| Suspension Bridge Tower Construction | Joseph Strauss | September 22, 1936 | 2054995 | Here, Strauss patented his design for the Golden Gate Bridge's towers. | |
| Page Bascule Bridge Patent | John Page | June 16, 1903 | 731321 | Defines the Page bascule bridge type. | |
| Marsh Arch 1912 | James Marsh | Marsh Engineering Company of Des Moines, Iowa | August 6, 1912 | 1035026 | Describes the unique construction details of a Marsh Arch type bridge. |
| March Arch 1921 | James Marsh | Marsh Engineering Company of Des Moines, Iowa | August 23, 1921 | 1388584 | Describes the unique construction details of a Marsh Arch type bridge. |
| Joseph Davenport Bowstring Patent 1867 | Joseph Davenport | Massillon Bridge Company of Massillon, Ohio | December 24, 1867 | 72611 | Describes the unique construction details of a Massillon Bridge Company bowstring. |
| Joseph Davenport Bowstring Patent 1868 | Joseph Davenport | Massillon Bridge Company of Massillon, Ohio | September 22, 1868 | 82388 | Describes the unique construction details of a Massillon Bridge Company bowstring. |
| T. B. Mills / King Bridge Company - Bridge Piers | Theodore B. Mills | King Bridge Company of Cleveland, Ohio | October 15, 1872 | 132307 | Describes the unique construction details of cast iron piers often seen with King bowstrings. |
| King Bridge Company Zenas King Bowstring Patent 1866 | Zenas King | King Bridge Company of Cleveland, Ohio | September 25, 1866 | 58266 | Describes the unique construction details of a King Bridge Company bowstring. |
| King Bridge Company Zenas King Bowstring Patent 1874 | Zenas King | King Bridge Company of Cleveland, Ohio | August 25, 1874 | 6026 | Describes the unique construction details of a King Bridge Company bowstring. |
| Oliver Perry and William Allen Bowstring Patent | Oliver Perry and William Allen | Allen, McEvoy and Company of Beloit, Wisconsin | October 24, 1871 | 120319 | Closest associated patent with the Moneek "Eureka" Bridge in Iowa |
| Wendel Bollman Truss Patent 1852 | Wendel Bollman | January 6, 1852 | 8624 | Defines the Bollman truss configuration. | |
| Albert Fink Truss Patent 1854 | Albert Fink | May 9, 1854 | 10887 | Defines the Fink truss configuration. | |
| W. O. Douglas Berlin Iron Bridge Company Lenticular Truss Bridge Patent 1878 | William Douglas | Berlin Iron Bridge Company of East Berlin, Connecticut | April 16, 1878 | 202526 | Defines the Lenticular truss configuration. |
| Parker Patent Truss Bridge | Charles Parker | National Bridge Company of Boston, Massachusetts | February 22, 1870 | 100185 | Defines the Parker truss configuration and also the distinctive details of "Parker Patent" type bridges. |
| Post Truss Bridge | Simeon Post | Watson Manufacturing Company of Paterson, New Jersey | June 16, 1863 | 38910 | Defines the Post truss configuration. |
| William Johnson Patented Tension Control Devices | William Johnson | WM Cowin of Lambertville, Pennsylvania | November 29, 1870 | 109628 | Defines the unique tension control devices found on William Cowin's bridges. |
| Avery and Bartholomew Truss Bridge Patent 1877 | Oliver Avery and Caleb Bartholomew | Groton Bridge Company of New York, New York | April 3, 1877 | 189170 | Defines the unique bowstring truss design composed of railroad rails. |
| Avery and Bartholomew Bridge Pier Patent 1877 | Oliver Avery and Caleb Bartholomew | Groton Bridge Company of New York, New York | April 3, 1877 | 189171 | Patented pier design to go with the bowstring patent. |
| Colby Truss Bridge Patent 1877 | Ellery Colby | Groton Bridge Company of New York, New York | February 20, 1877 | 187513 | Offspring patents from the Avery and Bartholomew Patents. |
| Colby Bridge Pier Patent 1877 | Ellery Colby | Groton Bridge Company of New York, New York | April 3, 1877 | 189020 | Offspring patents from the Avery and Bartholomew Patents. |
| Samuel Reeves Phoenix Column Patent 1862 | Samuel Reeves | Phoenix Bridge Company of Phoenixville, Pennsylvania | June 17, 1862 | 35582 | Defines the Phoenix column built-up beam type. |
| Edwin Thacher Truss Bridge Patent | Edwin Thacher | Wrought Iron Bridge Company of Canton, Ohio | January 13, 1885 | 310747 | Defines the Thacher truss configuration. |
| Hugo A. F. Abt Bascule Truss Bridge Patent | Hugo A. F. Abt | American Bridge Company of New York, New York | October 25, 1921 | 1394519 | Defines the Abt Bascule Bridge type. |
| George Pegram Truss Bridge | George Pegram | Edge Moor Bridge Works of Wilmington, Delaware | March 24, 1885 | 314262 | Defines the Pegram truss configuration. |
| Joseph Henszey Bowstring Bridge | Joseph Henszey | June 22, 1869 | 91745 | Defines the Henszey Bowstring design. | |
| Pratt Truss Patent 1844 | Thomas Pratt and Caleb Pratt | April 4, 1844 | 3523 | Defines the Pratt truss configuration. | |
| Whipple Arch Bridge Patent | Squire Whipple | April 24, 1841 | 2064 | Defines the "Whipple Arch" Bowstring Truss Bridge | |
| Waddell A-Frame Truss Bridge Patent | John A. L. Waddell | J. A. L. Waddell | November 13, 1894 | 529220 | |
| Sherman Bridge Type Patent | Evrett Sherman | May 11, 1877 | 191552 | Defines the "Sherman Patent" bridge type. | |
| Howe Truss Patent 1844 | William Howe | August 3, 1840 | 1711 | Defines the Howe truss configuration. |
