| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 5 | |
| #2 | United Kingdom | 4 | |
| #3 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Basic communication technologies | |
| #2 | Telecommunications | |
| #3 | Electrical machinery and energy | |
| #4 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Transmission | |
| #2 | Amplifiers | |
| #3 | Resonators | |
| #4 | Waveguides | |
| #5 | Modulation | |
| #6 | Circuits for supplying electric power | |
| #7 | Radio navigation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Covill Dennis H | 9 |
| #2 | Covill Dennis Henry | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4785267A | Radio frequency combiner | |
| US4605910A | AM pulse duration modulator | |
| GB8302737D0 | Combiner network | |
| CA1187145A | Driver circuit | |
| CA1116253A | Combiner system | |
| CA962340A | Four port combiner | |
| CA1027180A | Beacon transmitter |