Operating originally in London, its reputation grew in The Potteries, where it was a latecomer compared to Royal Crown Derby, Royal Worcester, Wedgwood, Spode and Mintons.
Its products include dinnerware, giftware, cookware, porcelain, glassware, collectables, jewellery, linens, curtains and lighting.
The partners were initially Herbert James Aynsley, John Gerrard Aynsley and William Illingworth.
Famous artists represented in the HN figurine collection include Charles Noke, Leslie Harradine and Peggy Davies.
His son, Henry Doulton, established the Lambeth and Burslem Studios to create unique art pottery.
Sir Henry was knighted for his services to the ceramic industry and continuing royal patronage from Queen Victoria and King Edward VII led to the title Royal Doulton in 1901.
From 1775 the wavy lines were painted by hand, but in the 1870's Royal Copenhagen began to stamp and glaze the trademark.
Since 1935 Royal Copenhagen have added a small line in the trademark on almost every single piece of porcelain.