In 1803 an English inventor, by the name of Robert Ransome patented a Self-sharpening Plow. Later Ransome created the first plow made of interchangeable parts so that they could be repaired in the field.
- Robert Ransome – Wikipedia
Robert Ransome (1753 – 7 March 1830) was an English maker of agricultural implements. He founded the company later known as Ransomes, Sims & Jefferies.
- Ransome Victory Plough – Wikipedia
In 1789 Robert Ransome, an iron-founder in Ipswich started casting ploughshares in a disused malting at St Margaret’s Ditches.
- Robert Ransome « The Abbot’s Hall Almanac
Robert Ransome opened an ironmongery shop in Norwich in 1774 which developed into one of only two Iron foundries in East Anglia at the time.