Complex sentence: Albert E. Richardson was a clockmaker from Ashton under Lyne, Lancashire, who designed the first practical Teasmade he sold the design to Frank Clarke of Birmingham, Warwickshire, who patented it.
Split into simpler sentences: Albert E. Richardson was a clockmaker from Ashton under Lyne, Lancashire, who designed the first practical Teasmade. He sold the design to Frank Clarke of Birmingham, Warwickshire, who patented it.