| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | Switzerland | 3 | |
| #3 | Netherlands | 3 | |
| #4 | United States | 3 | |
| #5 | USSR (Union of Socialist Soviet Republics) | 2 | |
| #6 | France | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Hungary | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Machines | |
| #3 | Materials and metallurgy | |
| #4 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Centrifuges | |
| #2 | Mixing | |
| #3 | Separation | |
| #4 | Chemical or physical processes | |
| #5 | Climate change mitigation in goods production | |
| #6 | Ammonia or cyanogen |
| # | Name | Total Patents |
|---|---|---|
| #1 | Sendov Stojan Christov Dipl In | 6 |
| #2 | Mirtschev Mirtscho Georgiev Di | 6 |
| #3 | Nikolov Ivan Angelov Dipl Ing | 6 |
| #4 | Kuklin Ivan Alexandrov Dipl In | 6 |
| #5 | Mirchev Mircho Georgiev | 4 |
| #6 | Nikolov Ivan Angelov | 4 |
| #7 | Ivanov Assen Ninov Dipl Chem | 2 |
| #8 | Kurtaschev Radoslav Borissov D | 2 |
| #9 | Evtimov Stojan Ivanov Dipl Ing | 2 |
| #10 | Kuklin Ivan Alexandrov | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US4160647A | Continuous operation extractor | |
| CH613124A5 | Extractor with continuous action | |
| US4097927A | Apparatus for mixing bulk materials | |
| US4065393A | Conical centrifuge with continuous action | |
| GB1148513A | Improvements in or relating to the manufacture of ammonia |