Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8153165 | Preparation and use for reducing the damaging effect of ammonia on organisms living in water | — | 2012-04-10 |
| 7244358 | Denitrification of aquarium water | — | 2007-07-17 |
| 6979411 | Water treatment agent for extending water exchange intervals in tank systems | — | 2005-12-27 |
| 6477982 | Substances and method for the production of water suitable for aquariums or garden ponds | — | 2002-11-12 |
| 5719189 | Medicinal feed for the systemic treatment of ectoparasitic and ectobacterial diseases of fish | Hartmut Schmidt | 1998-02-17 |
| 5712290 | Medicinal feed for the systemic treatment of ectoparasitic and ectobacterial diseases of fish | Hartmut Schmidt | 1998-01-27 |
| 5670513 | Medicinal feed for the systemic treatment of ectoparasitic and ectobacterial diseases of fish | Hartmut Schmidt | 1997-09-23 |
| 5538552 | Waste treatment process | Dirk Osing, Gunter Treutlein, Manfred Erken | 1996-07-23 |
| 5474703 | Flocculating agent containing aluminum and a polybasic carboxylic acid | — | 1995-12-12 |
| 4858480 | Swash plate swivel bearing for a hydraulic axial piston machine | Rolf Rohde | 1989-08-22 |
| 4839148 | Method of removing SO.sub.x and NO.sub.x from effluent gas | Peter Asmuth, Ludwig Raible | 1989-06-13 |
| 4747975 | Method of dissolving, and solvents for, difficult to dissolve carbonates | — | 1988-05-31 |
| 4726936 | Apparatus for injecting a substance into a reaction vessel | Kurt Erdt, Albert Merz | 1988-02-23 |
| 4659557 | Process for producing ferrous sulphate in granule form | Uwe Lenz | 1987-04-21 |
| 4569228 | Probe tube which can be introduced into a reaction container for detecting the operating condition of a medium | Dieter Bellgardt, Werner Bauer, Joachim Werther | 1986-02-11 |
| 4464479 | Method for treating red mud | Uwe Lenz, Paul Lazik | 1984-08-07 |
| 4383924 | Treatment of water, especially water for aquaria | — | 1983-05-17 |
| 4372858 | Method of regenerating ion exchangers | — | 1983-02-08 |