CH213753A
(en )
1941-03-15
Process for producing positive blueprints.
CH219951A
(en )
1942-03-15
Process for the production of photographic material, in particular for color photographic images.
CH226702A
(en )
1943-04-30
Process for the preparation of color photographic images.
CH223085A
(en )
1942-08-31
Process for the preparation of color photographic images.
CH227990A
(en )
1943-07-31
Process for the preparation of color photographic images.
FR824203A
(en )
1938-02-04
Polychrome photography process
CH230715A
(en )
1944-01-31
Process for making photographic images.
CH209179A
(en )
1940-03-31
Process for making photographic dye images.
CH231269A
(en )
1944-03-15
Process for the preparation of color photographic images.
CH219953A
(en )
1942-03-15
Process for making colored photographic material.
CH254797A
(en )
1948-05-31
Process for making cryolite.
CH225177A
(en )
1943-01-15
Process for the preparation of color photographic images.
CH204534A
(en )
1939-05-15
Process for the production of photographic layers.
CH225575A
(en )
1943-02-15
Process for the preparation of color photographic images.
CH221616A
(en )
1942-06-15
Process for making photographic images.
CH221617A
(en )
1942-06-15
Process for the preparation of color photographic images.
CH222821A
(en )
1942-08-15
Process for the preparation of color photographic images.
CH232384A
(en )
1944-05-31
Process for producing color photographic images.
CH252075A
(en )
1947-11-30
Process for the manufacture of photographic material.
CH234804A
(en )
1944-10-31
Process for the preparation of color photographic images.
CH235785A
(en )
1944-12-31
Process for making photographic images.
CH201644A
(en )
1938-12-15
Process for the production of multicolor photographic images.
CH233314A
(en )
1944-07-15
Method for transmitting still images.
CH229207A
(en )
1943-10-15
Process for producing color photographic images.
CH223793A
(en )
1942-10-15
Process for the preparation of color photographic images.