Magnetic field detectors from the first commercial magnetocephalography scanner (MEG).
1990s
1990s
1989
1987
1987
2000-100 BCE
1990
1988
1989
1989
1990s
1989
1990-96
1988
1989
1987
1988
1987
1990
1988
1988
4000-2001 BCE
1990
1990
1988
1989
1990
1990
1990
1988
1987
1989
circa 1990
1987
1989
1987
1988
1988
1988
1988
2500 BCE
1989
1988
circa 1990
1990-95
circa 1990
1990
1989
1987
1989
1990s