| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | Japan | 2 | |
| #3 | United States | 2 | |
| #4 | Austria | 1 | |
| #5 | Switzerland | 1 | |
| #6 | France | 1 | |
| #7 | Italy | 1 |
| # | Industry | |
|---|---|---|
| #1 | Surface technology and coating | |
| #2 | Environmental technology | |
| #3 | Chemical engineering | |
| #4 | Measurement | |
| #5 | Control | |
| #6 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hashimoto Yasuhiko | 3 |
| #2 | Nakamura Hiroshi | 3 |
| #3 | Nakamura T | 2 |
| #4 | Nakamura Toshihiko | 2 |
| #5 | Marquardt Kurt | 2 |
| #6 | Kawamoto Yoshihide | 1 |
| #7 | Yokohama Kanagawa Japan | 1 |
| #8 | Yokohama Kanagawa | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2724724A1 | METHOD AND DEVICE FOR RECOVERY OF HEAVY METALS FROM WATER | |
| DE2254682A1 | Treating effluents contg. chromates or cyanides - using redox potentiometer with pH correction circuit to avoid inadequate or excess dosing with chemicals | |
| US3825483A | Red-ox potentiometer provided with a ph correction circuit | |
| US3826741A | Method of treating waste solution containing chromate ion or cyanide ion |