CH55503A
(en )
1912-08-16
Process for the production of porous artificial stones
CH50173A
(en )
1911-05-01
Process for the production of artificial stone slabs
CH51068A
(en )
1911-07-17
Process for the production of artificial stone slabs
CH57227A
(en )
1912-12-16
Process for the production of artificial stones
CH51608A
(en )
1911-09-01
Process for the production of artificial stone
CH65491A
(en )
1914-06-16
Process for the production of hollow stones closed on all sides
CH59610A
(en )
1913-06-02
Process for the production of artificial stones
CH61357A
(en )
1913-09-16
Process for the production of artificial stones
CH58857A
(en )
1913-04-01
Process for the production of artificial stones
CH56522A
(en )
1912-11-01
Process for the production of artificial building blocks
CH50536A
(en )
1911-06-01
Process for the manufacture of filters
CH53335A
(en )
1912-02-01
Process for the production of hydroquinine
CH48317A
(en )
1910-10-01
Process for the production of artificial stones interspersed with bubbles
CH67258A
(en )
1914-11-16
Process for the production of artificial sponge
CH57919A
(en )
1913-02-17
Process for the production of artificial lithography stones
AT74183B
(en )
1918-02-25
Process for the production of artificial stone.
CH56308A
(en )
1912-11-01
Process for the production of quartz hollow bodies
CH52149A
(en )
1911-11-01
Process for the production of bodies that imitate wood or stone cuts
CH55315A
(en )
1912-08-01
Process for the production of road surfaces
AT70872B
(en )
1916-01-10
Process for the production of artificial marble.
CH64663A
(en )
1914-04-16
Process for the production of colored patterned artificial stones
CH53957A
(en )
1912-04-01
Process for the production of artificial tobacco leaves
CH55514A
(en )
1912-08-16
Process for the production of vitreous bodies
CH67386A
(en )
1914-12-01
Process for the production of artificial stones from peat
CH52690A
(en )
1911-12-16
Process for the manufacture of abrasive cloths