CH71810A
(en )
1916-02-16
Process for the production of artificial leather
CH56855A
(en )
1912-11-16
Process for the production of artificial leather
CH73105A
(en )
1916-08-16
Process for the production of leather substitutes
CH75980A
(en )
1918-03-16
Process for the production of artificial leather
CH77110A
(en )
1918-08-01
Process for the production of artificial leather
CH77381A
(en )
1918-09-02
Process for the production of artificial leather
CH81317A
(en )
1919-06-02
Process for the production of leather
CH68920A
(en )
1915-05-01
Process for the production of artificial leather
CH68668A
(en )
1915-04-01
Process for the production of artificial sole 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
AT91349B
(en )
1923-02-26
Process for the production of leather.
CH72628A
(en )
1916-06-16
Process for the production of antimonies
CH79342A
(en )
1919-03-17
Process for the production of artificial leather
CH79811A
(en )
1919-01-16
Process for the production of artificial leather
CH71436A
(en )
1916-01-03
Process for the production of briquettes
CH73591A
(en )
1916-10-16
Process for the production of colored stereo images
CH72948A
(en )
1916-08-01
Process for the production of reversible shoes
CH70142A
(en )
1915-09-01
Process for the production of footwear heels
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