<i>Title:</i> Patent official, patent record files. Files of patents of which 2,180,00 have been issued. These files extend over 50 miles in total length and are kept in air conditioned portion of the building, washed air keeps paper from iridizing. Another old patent of drawing without the specification. This describes a spinning and weaving machine for cotton. December 30, 1791
<i>Abstract/medium:</i> 1 negative : glass ; 4 x 5 in. or smaller
Harris &amp; Ewing, photographer
1940
<p>Library of Congress
</p>
<ul><li><i>Catalog:</i> <a rel="nofollow" class="external free" href="https://lccn.loc.gov/2016877283">https://lccn.loc.gov/2016877283</a></li>
<li><i>Image download:</i> <a rel="nofollow" class="external free" href="https://cdn.loc.gov/master/pnp/hec/28300/28337a.tif">https://cdn.loc.gov/master/pnp/hec/28300/28337a.tif</a></li>
<li><i>Original url:</i> <a rel="nofollow" class="external free" href="https://www.loc.gov/pictures/item/2016877283/">https://www.loc.gov/pictures/item/2016877283/</a></li></ul>