Publication date: 19 Feb 1878.
Issue: 24553.
Page: 30.
Name: John Hammond.
Marital Status: Not given.
Occupation: Gas Engineer.
Patent Law Amendment Act, 1852. Office of the Commissioners of Patents for Inventions. Notice is hereby given, that - 3817. And John Hammond, of Lewes, in the county of Sussex, Gas Engineer, has given the like notice in respect of the invention of "improvements in purifying coal gas. " As set forth in their respective petitions, all recorded in the said office on the 15th day of October, 1877.