| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 13 | |
| #2 | Switzerland | 3 | |
| #3 | France | 3 | |
| #4 | United Kingdom | 3 | |
| #5 | Austria | 2 | |
| #6 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Measurement | |
| #3 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Measuring distances | |
| #3 | Goods for writing upon | |
| #4 | Special measuring |
| # | Name | Total Patents |
|---|---|---|
| #1 | H Photogrammetrie G M B | 3 |
| #2 | Scheffold Hermann | 2 |
| #3 | Zurlinden Robert | 2 |
| #4 | Meilbeck Dipl-Ing Albert | 1 |
| #5 | Aschenbrenner Claus | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB338301A | Improvements in film-feed mechanism for roller-film cameras | |
| GB294652A | Improvements in apparatus for plotting or drawing plans from aerial photographs | |
| GB282422A | Improvements in cameras for taking aerial photographs | |
| DE469413C | Multiple chamber for recordings from aircraft | |
| DE473237C | Image measuring device | |
| CA310197A | Multiple chamber for taking photographs from aeroplanes |