| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 5 | |
| #2 | Canada | 3 | |
| #3 | Spain | 2 | |
| #4 | Germany | 1 | |
| #5 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Telecommunications | |
| #2 | Basic communication technologies |
| # | Technology | |
|---|---|---|
| #1 | Multiplex communication | |
| #2 | Modulation | |
| #3 | Transmission |
| # | Name | Total Patents |
|---|---|---|
| #1 | Armstrong Edwin Howard | 10 |
| #2 | Pupin Michael Idvorsky | 3 |
| Publication | Filing date | Title |
|---|---|---|
| GB191424231A | Improved Receiving System for Continuous Electric Waves. | |
| CA354865A | Radio signalling system | |
| CA354866A | Radio signalling system | |
| CA335160A | Radio telephone signalling system |