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
CH74848A
(en )
1917-04-16
Process for the production of leather by means of iron salts
CH81317A
(en )
1919-06-02
Process for the production of leather
AT91349B
(en )
1923-02-26
Process for the production of leather.
CH65140A
(en )
1914-05-16
Process for the production of leather
CH66042A
(en )
1914-08-01
Process for the production of leather
CH66043A
(en )
1914-08-01
Process for the production of leather
CH66044A
(en )
1914-08-01
Process for the production of leather
CH71810A
(en )
1916-02-16
Process for the production of artificial leather
CH72948A
(en )
1916-08-01
Process for the production of reversible shoes
CH77110A
(en )
1918-08-01
Process for the production of artificial leather
CH77381A
(en )
1918-09-02
Process for the production of artificial leather
CH75980A
(en )
1918-03-16
Process for the production of artificial leather
CH77919A
(en )
1918-06-01
Process for the production of footwear running parts
CH81781A
(en )
1919-07-16
Process for the production of full, flexible iron leather
CH56855A
(en )
1912-11-16
Process for the production of artificial leather
AT91345B
(en )
1923-02-26
Process for the production of iron leather.
CH75657A
(en )
1917-09-01
Process for the production of a sole leather substitute material
CH65547A
(en )
1914-06-16
Process for the production of leather fats
CH74962A
(en )
1917-05-01
Process for the production of gray cast iron
CH68920A
(en )
1915-05-01
Process for the production of artificial leather
CH73105A
(en )
1916-08-16
Process for the production of leather substitutes
CH73106A
(en )
1916-10-02
Process for the production of a leather substitute