| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 7 | |
| #2 | France | 3 | |
| #3 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Digital networks | |
| #2 | Measurement | |
| #3 | Electrical machinery and energy | |
| #4 | Telecommunications |
| # | Technology | |
|---|---|---|
| #1 | Digital information transmission | |
| #2 | Special measuring | |
| #3 | Transmission | |
| #4 | Measuring electric variables | |
| #5 | Electric switches |
| # | Name | Total Patents |
|---|---|---|
| #1 | Heurtley Ernest Sydney | 3 |
| Publication | Filing date | Title |
|---|---|---|
| GB283550A | Improvements in or relating to submarine or land cable telegraph systems | |
| GB252752A | Improvements in duplex telegraphy | |
| GB215434A | Improvements in telegraph systems | |
| GB198978A | Improvements in or relating to submarine telegraphy | |
| GB202759A | Improvements in or relating to automatic telegraphy | |
| GB193957A | Improvements in the working of telegraph cables | |
| GB159316A | Improvements in telegraphy |