Inventor · Forest Grove, OR, US

Karl Citek

28Patents
9h-index
19Co-inventors
68Inventor score

Filing activity: Apr 9, 1998 → Sep 11, 2013

Most-cited inventions

PatentTitleAreaCited byStatus
US6893127B2 Activity-specific optical filters and eyewear using such filters Physics 78 Expired
US7073208B2 Ventilated safety goggles Human Necessities 57 Expired
US6755525B2 Decentered protective eyewear Human Necessities 49 Expired
US6129435A Decentered protective eyewear Human Necessities 41 Expired
US6631987B2 Activity-specific optical filters and eyewear using such filters Physics 35 Expired
US8075431B2 Sporting ball with enhanced visual acuity Human Necessities 17 Active
US7963869B2 Chromatic architecture for sports equipment Human Necessities 17 Active
US7828434B2 Zone switched sports training eyewear Physics 14 Active
US7370374B2 Ventilated safety goggles Human Necessities 10 Expired
US8360905B2 Chromatic architecture for sports equipment Human Necessities 8 Expired
US8209770B2 Spectrally balanced protective facemasks Human Necessities 7 Active
US7403346B2 Inclined-edged sports lens Human Necessities 6 Active
US7389543B2 Optically decentered face shield Physics 5 Expired
US7814577B2 Spectrally balanced protective facemasks Human Necessities 5 Active
US7475435B2 Swim goggles Human Necessities 5 Expired
US8104891B2 Optically decentered face shield Physics 5 Active
US9000390B2 Eyeglass rating with respect to protection against UV hazard Physics 5 Active
US9539472B2 Soccer ball with motion graphic Human Necessities 4 Active
US8272070B2 Conical face shield Human Necessities 4 Active
US7850303B2 Optically decentered face shield Physics 3 Active
US7980693B2 Anaglyphic depth perception training or testing Human Necessities 3 Active
US8002408B2 Anaglyphic depth perception training or testing Human Necessities 2 Active
US9404863B2 Eyeglass rating with respect to protection against UV hazard Physics 2 Active
US8678582B2 Optically decentered face shield Physics 2 Active
US8512180B2 Soccer ball with motion graphic Human Necessities 2 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.