John G. Thom
of Canal Works, Patricroft, near Manchester. This was a small works located by the Bridgewater Canal, 150 yards north of Nasmyth Wilson's Bridgewater Foundry.
Founded by John Thom.
1949 Company name was John Thom Ltd of Canal Works, Patricroft, near Manchester.
The business relationship between John G. Thom, John K. Thom, John P. Thom and John Z. Thom is unclear.
- Deep well pump preserved at Markham Grange Steam Museum.