Willinger Bros., Inc.
46Patents
0Active
46Granted
35Portfolio score
Filing activity: Jul 28, 1976 → Jun 23, 1993
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4512885A | Aquarium filter assembly | Human Necessities | 49 | Expired |
| US4783258A | Filter cartridge with reuseable framework | Human Necessities | 41 | Expired |
| US4735715A | Power unit for aquarium filter assembly | Human Necessities | 36 | Expired |
| US5053125A | Filter cartridge | Human Necessities | 35 | Expired |
| US5228986A | Aquarium power filter | Human Necessities | 33 | Expired |
| US5176824A | Aerobic aquarium filter chamber | Human Necessities | 30 | Expired |
| US4761227A | Self priming aquarium filter | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4622148A | Aquarium filter system | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4602996A | Aquarium filter assembly | Human Necessities | 26 | Expired |
| US4369216A | Artificial aquarium plant | Human Necessities | 22 | Expired |
| US5098585A | Aquarium filter assembly | Human Necessities | 22 | Expired |
| US4186093A | Bottom aquarium filter | Human Necessities | 22 | Expired |
| USD247436S | Aquarium air pump | General | 21 | Expired |
| US4265751A | External biological aquarium filter | Human Necessities | 19 | Expired |
| US5246571A | Clogging indicator for an aquarium filter | Performing Operations; Transporting | 17 | Expired |
| US5304003A | Stick-on aquarium thermometers and the like | Physics | 17 | Expired |
| US5238367A | Impeller assembly for aquarium power filter | Human Necessities | 16 | Expired |
| US5282961A | Floating impeller assembly | Human Necessities | 16 | Expired |
| US4699829A | Biological filtration plants | Human Necessities | 15 | Expired |
| US4532037A | Aquarium aerating device | Human Necessities | 14 | Expired |
| US4185743A | Artificial aquarium plant, anchor and container therefor | Human Necessities | 13 | Expired |
| USD355701S | Aquarium filter | General | 12 | Expired |
| USD249879S | Anchor for artificial aquarium plant | General | 12 | Expired |
| US4148730A | Undergravel aquarium filter | Human Necessities | 12 | Expired |
| USD247435S | Aquarium air pump | General | 12 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.