Diagram of Patent 1,345,655 Wood Screw Pump from US Patent Office. Filed 1913; Patent finalized 1920. Image to be used in <a href="https://en.wikipedia.org/wiki/A._Baldwin_Wood" class="extiw" title="en:A. Baldwin Wood">en:A. Baldwin Wood</a> and <a href="https://en.wikipedia.org/wiki/Wood_Screw_Pump" class="extiw" title="en:Wood Screw Pump">en:Wood Screw Pump</a>. Image from Patent Office website.
<a href="https://en.wikipedia.org/wiki/A._Baldwin_Wood" class="extiw" title="en:A. Baldwin Wood">A. Baldwin Wood</a>
1920-07-06
<span><a rel="nofollow" class="external text" href="https://patents.google.com/patent/US1345655">U.S. Patent 1,345,655</a></span>