Timeline of 1900's By 07055.casp Jun 8, 1900 invention of the vacuum cleaner Jan 7, 1902 invention of air conditioning; automatic tea maker Feb 4, 1903 invention of electrocardiogram; first powered flight Dec 17, 1903 electrocardiogram; first powered flight Feb 29, 1904 radar; tea bags Feb 15, 1905 invention of plastic Mar 4, 1906 radio broadcasting Feb 6, 1907 invention of electric washing machine Feb 6, 1908 invention of coffee filter; water coolers; paper cups Feb 6, 1913 invention of crossword puzzles; bras; zips Feb 6, 1916 invention of sonar Feb 6, 1920 invention of hair dryers; kiss-proof lipstick Feb 6, 1921 invention of robots; insulin Feb 6, 1924 invention of rozen food Feb 6, 1925 invention of television Feb 6, 1926 invention of aerosol sprays Feb 6, 1927 invention of Talkies’ at the movies Feb 6, 1928 invention of penicillin Feb 6, 1930 invention of jet engine; mechanical toothbrushes; Scotch tape Feb 6, 1932 invention of parking meter Feb 6, 1935 invention of electric guitar Feb 6, 1936 invention of sun tan lotion; electric blanket Feb 6, 1938 invention of ballpoint pen; photocopying Feb 6, 1939 invention of helicopters Feb 6, 1942 invention of first nuclear reactor built; Feb 6, 1946 invention of microwave ovens; automation; Bikini; Tupperware; Tupperware Parties Feb 6, 1947 invention of transistors; holograms; mobile phones Feb 6, 1948 invention of frisbees; velcro; general purpose computers; contact lenses Feb 6, 1950 invention of credit cards Feb 6, 1951 invention of Tetrapak cartons of milk Feb 6, 1952 inventon of wide-screen cinema Feb 6, 1953 invention of transistor radio Feb 6, 1954 invention of solar cell Feb 6, 1955 invention of atomic clock Feb 6, 1956 invention of video tape recorder Feb 6, 1957 invention of satellite Feb 6, 1958 invention of video games; modems Feb 6, 1959 invention of car seat belts Feb 6, 1960 invention of cardiac pacemaker; laser Feb 6, 1961 invention of Man in Space Feb 6, 1964 inventon of computer mouse; miniskirt Feb 6, 1965 invention of optical disc; bay buggy; HTML Feb 6, 1966 invention of pocket television Feb 6, 1967 invention of portable calculator Feb 6, 1968 invention of biometrics; Workmate; artificial heart Feb 6, 1969 invention of the Internet; cash dispenser Feb 6, 1970 invention of LED and LCD’s Feb 6, 1971 invention of floppy disc Feb 6, 1973 invention of barcodes; post-it-note; car airbags Feb 6, 1975 invention of personal computer; laser printer Feb 6, 1977 invention of MRI scanner; inkjet printer Feb 6, 1979 invention of first personal stereo Feb 6, 1980 invention of Hepatitis B vaccine Feb 6, 1987 invention of disposable contact lenses Feb 6, 1989 invention of World Wide Web