| Logier, John Bernard | 1809–1846 |
| Mackintosh & Co. | 1853–1884 |
| May & Sons | 1860 |
| Pohlmann & Son | 1880–1883 |
| Sullivan, J.M. & Co. | 1877-80 |
| Telford & Sons | 1870–? |
| Telford & Telford | 1847–1870 |
| Telford, Edward Henry | 1870–1932 |
| Telford, Henry | 1847–1866 |
| Telford, William | 1830–1885 |
| Telford, William Hodgson | 1870–1890 |
| Walsh, Nicholas | 1845–after 1850 |
