| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 15 | |
| #2 | India | 11 | |
| #3 | United Kingdom | 2 | |
| #4 | Poland | 2 | |
| #5 | Belgium | 1 | |
| #6 | China | 1 | |
| #7 | Germany | 1 | |
| #8 | France | 1 | |
| #9 | Netherlands | 1 | |
| #10 | USSR (Union of Socialist Soviet Republics) | 1 | |
| #11 | Yugoslavia (Serbia and Montenegro) | 1 | |
| #12 | Zambia | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Measurement | |
| #3 | Control | |
| #4 | Materials and metallurgy | |
| #5 | Environmental technology | |
| #6 | Electrical machinery and energy | |
| #7 | Machine tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Van Der Walt Nicolaas T | 4 |
| #2 | Bredenkamp Gordon L | 4 |
| #3 | Bout Bernardus J | 3 |
| #4 | Louw Clive Norman | 2 |
| #5 | Whyte Rodney Murison | 2 |
| #6 | Bout Bernardus Johannes | 2 |
| #7 | Veronese Vittorio | 2 |
| #8 | Davidson Raymond John | 2 |
| #9 | Horsfal David W | 1 |
| #10 | Vickers Peter C | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4929897A | Method and apparatus for detecting cross sectional area variations in a elongate object by measuring radial magnetic flux variations using spaced-apart coils | |
| US5036277A | Method of and apparatus for detecting cross sectional area variations in an elongate object by the non-inductive measurement of radial flux variations | |
| US4666212A | Metal value recovery | |
| US4606219A | Gas detectors | |
| US4520255A | High frequency self-oscillating welding apparatus | |
| US4486038A | Energy storage | |
| US4453073A | High frequency welding apparatus | |
| YU146277A | Process for the isolation of magnesium oxide |