| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 6 | |
| #2 | Spain | 6 | |
| #3 | Denmark | 5 | |
| #4 | Austria | 4 |
| # | Industry | |
|---|---|---|
| #1 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Photosensitive materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | Piller Franz | 10 |
| #2 | Franz Piller | 5 |
| Publication | Filing date | Title |
|---|---|---|
| ES142441A1 | A basis for copying networks. | |
| ES142289A1 | A procedure for the making, on paper, of reticular chromatic copies, by means of optical copying of negatives or cross-linked slides in color or colored or transparent chromatic objects. | |
| ES141923A1 | A procedure to suppress the contrasts in the colored reticle negatives to be copied or in the slides. | |
| ES126249A1 | A procedure for obtaining images with natural colors using crosshairs of lines or other uniform classes and used in polychrome printing and color copies. |