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Patent applications and USPTO patent grants for Ritzow; Gerald R..The latest application filed is for "aquarium overflow filter system having a pre-overflow wall".
Patent | Date |
---|---|
Aquarium overflow filter system having a pre-overflow wall Grant 5,626,747 - Ritzow , et al. May 6, 1 | 1997-05-06 |
Vivarium Grant 5,328,049 - Ritzow July 12, 1 | 1994-07-12 |
Aquarium stand Grant 5,263,772 - Ritzow November 23, 1 | 1993-11-23 |
Lighting Fixture For Aquarium Or Similar Article Grant 3,836,765 - Ritzow , et al. September 17, 1 | 1974-09-17 |
Relay Contact Protecting Circuits Grant 3,639,808 - Ritzow February 1, 1 | 1972-02-01 |
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