FemtoMag, Inc. is usefully understood as developing innovative biosensor technologies for medical diagnostics. Specializingin advanced biosensor technologies targeting ultrasensitive quantitative detection of biomarkers for cancer diagnostics and treatment monitoring, infectious disease diagnostics, food safety, etc, the primary focus of FemtoMag, Inc. R&D efforts is development of innovative signal transducers for the detection and quantitation of magnetic nanoparticle reporters of biomolecular signals. Such magnetic reporters are attractive for reasons of their stability, low cost, and no technical issues such as sample turbidity, autofluorescence, photobleaching, and enzyme inhibitors. The technologies under development include giant magnetoresistive sensors, inductive sensors, and magnetoelectric sensors.