CH74200A
(en )
1917-01-16
Process for the production of glazed asbestos-cement boards
CH75422A
(en )
1917-07-16
Process for the production of glazed asbestos-cement articles
CH73443A
(en )
1917-03-16
Process for the production of artificial slates
CH76292A
(en )
1917-12-01
Process for the manufacture of objects from concrete
CH68990A
(en )
1915-05-17
Process for the production of soluble silica
CH58351A
(en )
1913-03-01
Process for the production of artificial building blocks
CH68831A
(en )
1915-04-16
Process for the production of borofluorotassium
CH68153A
(en )
1915-02-16
Process for the production of fuel
CH73574A
(en )
1916-10-16
Process for the production of oxygen
CH66000A
(en )
1914-08-01
Process for the production of incandescent bodies
CH72824A
(en )
1916-07-01
Process for the production of nitrogen compounds
CH72958A
(en )
1916-07-17
Process for the production of sodium percarbonate
CH72628A
(en )
1916-06-16
Process for the production of antimonies
CH76586A
(en )
1918-01-16
Process for the production of cork boards
CH78372A
(en )
1918-07-16
Process for the manufacture of stamps
CH74534A
(en )
1917-08-01
Process for the production of an anti-skid compound
CH71161A
(en )
1915-12-01
Process for the production of portland cement
CH66967A
(en )
1914-11-02
Process for the production of artificial marble
CH56522A
(en )
1912-11-01
Process for the production of artificial building blocks
CH77246A
(en )
1918-03-16
Process for the electrolytic production of persons
AT70872B
(en )
1916-01-10
Process for the production of artificial marble.
CH63494A
(en )
1914-02-02
Process for the production of components
CH72174A
(en )
1916-04-17
Process for the production of enamels
AT75645B
(en )
1919-02-25
Process for the production of two or more part porcelain insulators.
CH55514A
(en )
1912-08-16
Process for the production of vitreous bodies