Brown truss
...that the Brown truss was patented in 1857, enjoyed a brief spurt in popularity, was used in several covered bridges in Michigan in the mid 19th century, and was apparently never used again?
...that the <b id="mwDgs"><a href="./Brown_truss" id="mwDgw" rel="mw:WikiLink" title="Brown truss">Brown truss</a></b> <i id="mwDg0">(pictured: truss detail)</i> was <a href="./Patent" id="mwDg4" rel="mw:WikiLink" title="Patent">patented</a> in 1857, enjoyed a brief spurt in popularity, was used in <a class="mw-redirect" href="./List_of_Michigan_covered_bridges" id="mwDg8" rel="mw:WikiLink" title="List of Michigan covered bridges">several</a> <a href="./Covered_bridge" id="mwDhA" rel="mw:WikiLink" title="Covered bridge">covered bridges</a> in <a href="./Michigan" id="mwDhE" rel="mw:WikiLink" title="Michigan">Michigan</a> in the mid 19th century, and was apparently never used again?