| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 3 | |
| #2 | Austria | 2 | |
| #3 | Switzerland | 2 | |
| #4 | Spain | 2 | |
| #5 | Denmark | 1 | |
| #6 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Magnets and transformers | |
| #2 | Measuring electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Macadie Donald | 7 |
| #2 | Donald Macadie | 2 |
| Publication | Filing date | Title |
|---|---|---|
| GB190220289A | Improvements in Telephone Systems. | |
| CA239664A | Coil winding machine | |
| CA236252A | Electrical measuring instrument | |
| CA324064A | Telephone impulse sender |