The patent, originally held by William Cookworthy, for which Champion applied was for the sole use of certain materials for making porcelain. He was opposed by Josiah Wedgewood.
Reproduction of original from Goldsmiths' Library, University of London.
Goldsmiths'-Kress no. 11254.
Electronic reproduction. Farmington Hills, Mich. : Thomson Gale, 2005. Available via the World Wide Web. Access limited to licensing agreements.