Magnetometry

He has developed a high sensitivity, low frequency magnetometer, described in:

http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4256710&abstractAccess=no&userType=inst

This work has been cited over a period of 22 years, from 1987 to 2009, by (among others) 4 patent holders:

[P1] European Patent EP0246780, 1987, Magnetic field direction indicating devices, Inventor E.H. Oetzmann , Gec Avionics Ltd , (GB)

[P2] US Patent 4866384, Sep 12,1989, Relative phase magnetic field direction indicating devices useful as compasses, Inventor E.H. Oetzmann , Gec, Marconi (GB)

[P3] US Patent 5675252 , Oct 7 1997, Composite structured piezomagnetometer, Ιnventors Walter N. Podney, SQM Technology Inc, CA (USA)

[P4] US Patent 7569952 -August 4, 2009, High efficiency, inductive vibration energy harvester , Inventors Bono D.C. et al, Ferro Solutions Inc. (USA)