CH59169A
(en )
1913-05-02
Process for tanning rabbit fur
CH59429A
(en )
1913-05-02
Process for tanning animal hides
CH64853A
(en )
1914-05-01
Process for tanning animal hides
CH66045A
(en )
1914-08-01
Process for tanning animal hides
CH66328A
(en )
1914-10-16
Process for liming hides
CH72381A
(en )
1916-05-01
Process for pickling pelts
CH58422A
(en )
1913-03-01
Process for treating calcium cyanamide
CH65740A
(en )
1914-07-16
Process for drying patent leather
CH77117A
(en )
1918-03-01
Method for drying patent leather
CH77378A
(en )
1918-04-01
Method for drying patent leather
CH61744A
(en )
1913-10-16
Process for hardening metals
AT80067B
(en )
1920-02-25
Process for tanning animal hides.
CH61927A
(en )
1913-10-16
Method of tanning hides with the help of iron salts
CH51840A
(en )
1911-10-02
Process for dyeing leather
CH64697A
(en )
1914-04-16
Method for stiffening felt hats
CH74848A
(en )
1917-04-16
Process for the production of leather by means of iron salts
CH74849A
(en )
1917-04-16
Process for the production of leather by means of iron salts
CH75618A
(en )
1917-09-01
Process for the production of leather by means of iron salts
CH79743A
(en )
1919-01-02
Process for the production of leather by means of iron salts
NL154C
(en )
1914-03-16
Iron tanning process
CH67012A
(en )
1914-11-02
Process for decarburizing metals
CH75977A
(en )
1918-05-01
Method for drying patent leather
CH60976A
(en )
1913-09-01
Process for bleaching flour
CH61903A
(en )
1913-10-16
Machine for repairing damaged areas of objects made of patent leather
CH60548A
(en )
1913-07-16
Process for processing waste paper