| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 11 | |
| #2 | France | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Optics | |
| #3 | Telecommunications | |
| #4 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Measuring distances | |
| #2 | Optical systems | |
| #3 | Telephonic communication | |
| #4 | Testing of structures | |
| #5 | Metal wire processing | |
| #6 | Cameras | |
| #7 | Measuring speed and acceleration |
| # | Name | Total Patents |
|---|---|---|
| #1 | Heyde Julius | 2 |
| #2 | Julius Heyde | 1 |
| #3 | Johannes Heyde | 1 |
| #4 | Guth A. | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB340468A | Improvements in range and height finders | |
| GB362422A | Improvements in and relating to theodolites |