John Kendrew (1748-1800), a Darlington Quaker, is best known for having invented the first effective process for the mechanical spinning of flax. With Thomas Porthouse, a local clockmaker, he built a working machine and together in 1787 they patented the design in both England and Scotland. They licensed the technology to others, and subsequently each built their own mill — Kendrew's being near Haughton le Skerne on the NE outskirts of Darlington. After Kendrew's death, Porthouse took out his own patent, as did others and most flax mills were technological descendants of the Kendrew/Porthouse design.