Klaus Woltmann
38Patents
15h-index
11Co-inventors
78Inventor score
Filing activity: Jun 28, 1979 → Sep 13, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4783258A | Filter cartridge with reuseable framework | Human Necessities | 41 | Expired |
| US4842727A | Aquarium filter | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5053125A | Filter cartridge | Human Necessities | 35 | Expired |
| USD553305S1 | Pet mat | General | 33 | Expired |
| US4761227A | Self priming aquarium filter | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4285813A | Aquarium filtration apparatus | Human Necessities | 30 | Expired |
| USD550408S1 | Pet mat | General | 29 | Expired |
| US5397463A | Aerobic aquarium filter chamber | Human Necessities | 29 | Expired |
| US4880549A | Method of filtering in an aquarium tank with a filter envelope | Human Necessities | 22 | Expired |
| US5246571A | Clogging indicator for an aquarium filter | Performing Operations; Transporting | 17 | Expired |
| USD507681S1 | Handle for a double-sided grooming tool | General | 16 | Expired |
| US7350756B2 | Fastener | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6431118B1 | Apparatus and method for providing humidified air to a terrarium | Human Necessities | 15 | Expired |
| US4894151A | Filter cartridge for an undergravel aquarium filter | Human Necessities | 15 | Expired |
| USD592362S1 | Birdcage attachment | General | 15 | Expired |
| US6843909B1 | Three-stage aquarium filtration | Emerging Cross-Sectional Technologies | 15 | Expired |
| USD531889S1 | Fastener | General | 13 | Expired |
| US7736213B2 | Mounting arrangement for squeakers | Human Necessities | 13 | Active |
| US7392763B2 | Birdcage feeder | Human Necessities | 12 | Expired |
| USD595907S1 | Birdcage attachment | General | 12 | Expired |
| USD565456S1 | Plant base | General | 11 | Expired |
| US6971332B2 | Birdcage attachments | Human Necessities | 10 | Expired |
| USD530866S1 | Birdcage attachment | General | 9 | Expired |
| US7201115B2 | Birdcage waterer | Human Necessities | 8 | Expired |
| USD508589S1 | Birdcage attachment | General | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.