| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Sweden | 2 | |
| #3 | Canada | 1 | |
| #4 | Germany | 1 | |
| #5 | Ireland | 1 | |
| #6 | Italy | 1 | |
| #7 | Netherlands | 1 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Telecommunications |
| # | Technology | |
|---|---|---|
| #1 | Telephonic communication | |
| #2 | Selecting | |
| #3 | Multiplex communication |
| # | Name | Total Patents |
|---|---|---|
| #1 | Williams I H | 2 |
| #2 | Williams Ioan H | 2 |
| #3 | Dodman Eric | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1528158A | Pushbutton key-pad | |
| GB1525582A | Circuits for extracting power from a current-carrying lin | |
| IE38355L | Improvements in and relating to telephone systems | |
| GB1410508A | Telephone systems | |
| GB1420095A | Push-button key-pad | |
| GB1404570A | Circuit for extracting power from a current-carrying line |