Magnetic field detectors from the first commercial magnetocephalography scanner (MEG).
1990s
1990s
1990
1989
1989
1990-1991
2000-100
2000-100 BCE
1989
1990-1991
1990
1990s
1989
1990
1990
1990-96
1989
4000-2001 BCE
1989
1990
1970 and post 1989
1991
1991
10000-5000 BCE
1991
circa 1990
circa 1990
circa 1990
circa 1990
1990
1990s
1990
1990s
1991
1991
1990
circa 1990
1990
1989
1990
circa 1990
1990
1990
1990
1991
1991
circa 1990
1990
8500-2000 BCE
5000-500 BCE
2686-2613 BCE