Timeline
1909
U.S. copyright code revised.
1934
Magnetic tape first manufactured in Germany.
1944
3m begins experimenting with magnetic tape in United
States.
1945
German magnetic tape recorders captured by U.S. military.
1946
Television sets on sale in United States.
John T. Mullin demonstrates magnetic tape to Institute of
Radio Engineers.
1947
Bing Crosby begins prerecording his radio programs on
magnetic tape.
1948
Kinescopes introduced.
Late 1940s–
Audio recording emerges as an office technology and as an
early 1960s
amateur hobby.
1951
rca and Ampex begin developing videotape.
1956
Ampex demonstrates 2-inch Quadruplex video tape recorder.
1962–64
Philips audiocassette format introduced (dates vary by
source).
1964
8-track tapes introduced.
First copyright bill including fair-use provision introduced to
Congress.
1965
Sony develops 1/2-inch helical scan videotape.
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