This is a list of engineers and inventors from Cornwall, England, United Kingdom. * John Arnold, watchmaker and pioneer of the marine chronometer * William Bickford, inventor of the safety fuse * Joseph Henry Collins, mining engineer, mineralogist and geologist * Sir John Coode, civil engineer * William Cookworthy, discoverer of china clay (kaolinite) in Cornwall * Sir Humphry Davy, scientist, inventor and President of the Royal Society * Sir Goldsworthy Gurney, inventor of limelight * Jonathan Hornblower, inventor of the compound engine and the steam valve * William Husband, civil and mechanical engineer * Thomas Brown Jordan, engineer * Michael Loam, inventor of the man engine * Sir Thomas Matthews, civil engineer and builder of lighthouses * William Murdoch, engineer, inv