Magnetic field detectors from the first commercial magnetocephalography scanner (MEG).
1990s
1990s
1989
1985
1987
1986
1985
1985
1985
1987
1986
2000-100 BCE
1990
1988
1989
1986
1986
1989
1985
1990s
1985-1988
1985
1990-96
1988
1989
1988
1988
1990
1986
1985
1987
1988
1985
1989
4000-2001 BCE
1985
1988
1987
1990
1985
1990
1839 (original); circa 1988 (replica)
1989
1986
1985
1986
1986
1985
1985
1986
1985