| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 4 | |
| #2 | Argentina | 1 | |
| #3 | Australia | 1 | |
| #4 | Canada | 1 | |
| #5 | Switzerland | 1 | |
| #6 | Czechoslovakia | 1 | |
| #7 | Germany | 1 | |
| #8 | Spain | 1 | |
| #9 | United Kingdom | 1 | |
| #10 | Israel | 1 | |
| #11 | India | 1 | |
| #12 | Japan | 1 | |
| #13 | Netherlands | 1 | |
| #14 | Philippines | 1 | |
| #15 | Romania | 1 | |
| #16 | USSR (Union of Socialist Soviet Republics) | 1 | |
| #17 | United States | 1 | |
| #18 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Organic fine chemistry | |
| #2 | Pharmaceuticals |
| # | Technology | |
|---|---|---|
| #1 | Medical preparations | |
| #2 | Heterocyclic compounds |
| # | Name | Total Patents |
|---|---|---|
| #1 | Felder Ernst | 10 |
| #2 | Pitre Davide | 9 |
| #3 | Pitre D | 2 |
| #4 | Felder E | 2 |
| #5 | Pitre David E | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2547789A1 | EASILY WATER-SOLUBLE, NON-IONIC ROENTHY CONTRAST AGENTS AND PROCESS FOR THEIR PRODUCTION |