CH81317A
(en )
1919-06-02
Process for the production of leather
AT91349B
(en )
1923-02-26
Process for the production of leather.
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
CH77919A
(en )
1918-06-01
Process for the production of footwear running parts
CH71810A
(en )
1916-02-16
Process for the production of artificial leather
CH76586A
(en )
1918-01-16
Process for the production of cork boards
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
CH82059A
(en )
1919-08-16
Process for the production of leather substitutes
CH79342A
(en )
1919-03-17
Process for the production of artificial leather
CH79811A
(en )
1919-01-16
Process for the production of artificial leather
CH76592A
(en )
1918-01-16
Process for the production of fittings
CH73105A
(en )
1916-08-16
Process for the production of leather substitutes
CH75875A
(en )
1917-10-01
Process for the production of potassium persulfate
CH77112A
(en )
1918-03-01
Process for making shoes
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
CH75897A
(en )
1917-10-01
Process for the production of drive belts
CH78790A
(en )
1918-09-02
Process for the production of emulsion for technical purposes