| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | United Kingdom | 4 | |
| #3 | France | 3 |
| # | Technology | |
|---|---|---|
| #1 | Optical systems | |
| #2 | Cameras | |
| #3 | Aeroplanes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Heimstaedt Oskar | 2 |
| #2 | Heimstadt Oskar | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB211169A | Apparatus for the oblique projection of diapositives | |
| GB201087A | Improvements in or relating to binocular microscopes | |
| GB167130A | Improvements in or relating to stereoscopic eye-pieces for micropscopes | |
| GB149636A | Improvements in or relating to stereo-microscopes |