Die Deutschen Reichs-Patente der Klasse 28 (Gerberei)

The manufacture of leather : being a description of all the processes for the tanning and tawing with bark, extracts, chrome and all modern tannages in genaral use, and the currying, finishing and dyeing of every kind of leather, including the various raw materials , the tools, machines, and all details of importance connected with an intelligent and profitable prosecution of the art, with special reference to the best American practice to which are added lists of American patents (1884-1987) for materials, processes, tools and machines, for tanning, currying, etc.

Patentschrift: Nr. 253242 : Klasse 28a Gruppe 13.

Indeeling der techniek in uitvindingsklassen volgens het stelsel van het Duitsche 'Patentamt, Tweede uitgave 1910, vertaald door den technischen dienst bij den Octrooiraad

Patentschrift: Nr. 259247: Klasse 28a Gruppe 13.

Patentschrift: Nr. 305598: Klasse 28 a Gruppe 13

Patentschrift: Nr. 425181 : Klasse 28 a Gruppe 13

The boot and shoe manufactures' assistant and guide: containing a brief history of the trade. History of India-rubber and gutta-percha, and their application to the manufacture of boots and shoes. Full instructions in the art, with diagrams and scales, etc., etc. Vulcanization and sulphurization, English and American patents. With an elaborate treatise on tanning. [Facsimile]

1993 Michael Jackson's patent: King of Pop / inventor of shoes