CH77380A
(en )
1918-09-02
Waterproof leather substitute and process for its manufacture
CH79810A
(en )
1919-04-16
Waterproof leather substitute and process for its manufacture
CH80701A
(en )
1919-04-01
Waterproof leather substitute and process for its manufacture
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
CH75777A
(en )
1918-01-16
Process for the manufacture of a leather substitute
CH77251A
(en )
1918-03-16
Process for the manufacture of a leather substitute
AT91349B
(en )
1923-02-26
Process for the production of leather.
CH74996A
(en )
1917-05-16
Umbrella and process for its manufacture
CH76085A
(en )
1917-11-01
Shoe sole and process for its manufacture
AT76380B
(en )
1919-05-10
Process and system for the production of pre-doughs.
CH79384A
(en )
1918-11-01
Bevel gear and process for its manufacture
CH71810A
(en )
1916-02-16
Process for the production of artificial leather
CH77112A
(en )
1918-03-01
Process for making shoes
CH76592A
(en )
1918-01-16
Process for the production of fittings
CH77220A
(en )
1918-03-16
Method of making briquettes
CH76908A
(en )
1918-02-16
Burning briquette and process for making the same
CH79342A
(en )
1919-03-17
Process for the production of artificial leather
CH79811A
(en )
1919-01-16
Process for the production of artificial leather
CH73177A
(en )
1916-09-01
Briquette and process for its manufacture
AT98925B
(en )
1924-12-27
Process for the manufacture of cartridge cases.
CH77895A
(en )
1918-11-01
Briquette and process for its manufacture
CH78282A
(en )
1918-07-01
Process for the production of a tanning agent