Inventor · Santa Cruz, CA, US

Mark A. Christensen

92Patents
29h-index
48Co-inventors
88Inventor score

Filing activity: Sep 9, 1997 → Oct 23, 2023

Most-cited inventions

PatentTitleAreaCited byStatus
US7653508B1 Human activity monitoring device Physics 190 Active
US7881902B1 Human activity monitoring device Physics 175 Active
US7647196B2 Human activity monitoring device with distance calculation Physics 164 Active
US6293929A Wound irrigation apparatus Human Necessities 144 Expired
US7753861B1 Chest strap having human activity monitoring device Human Necessities 140 Active
US7637893B2 Valved sheath introducer for venous cannulation Emerging Cross-Sectional Technologies 120 Active
US6402724B1 Wound irrigation shield Human Necessities 115 Expired
US8177772B2 Catheter connection systems Human Necessities 110 Active
US8932258B2 Catheter placement device and method Human Necessities 90 Active
US7892181B2 Apparatus for monitoring intra-abdominal pressure Human Necessities 79 Active
US8320578B2 Headset Electricity 75 Active
US9594354B1 Smart watch extended system Human Necessities 73 Active
US8187182B2 Sensor fusion for activity identification Emerging Cross-Sectional Technologies 71 Active
US8998852B2 Catheter placement device and method Human Necessities 67 Active
US7987070B2 Eyewear having human activity monitoring device Human Necessities 67 Active
US8949070B1 Human activity monitoring device with activity identification Human Necessities 65 Active
US8784336B2 Stylet apparatuses and methods of manufacture Human Necessities 56 Active
US7457719B1 Rotational insensitivity using gravity-based adjustment Human Necessities 50 Active
US10493262B2 Blood control for a catheter insertion device Human Necessities 47 Active
US6708950B2 Bite valve Human Necessities 45 Expired
US5971357A Fluid delivery valve Human Necessities 42 Expired
US7112177B2 Apparatus for monitoring intra-abdominal pressure Human Necessities 42 Expired
US10426931B2 Catheter placement device and method Human Necessities 35 Active
US8052671B2 Intra-abdominal pressure monitoring device and method Human Necessities 34 Active
US6635020B2 Reusable fluid pressure transducer monitoring apparatus Human Necessities 34 Expired

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