Inventions 1900 to 1990 By 09368.casp Period: Jan 1, 1900 to Dec 31, 1990 Inventions Jan 1, 1901 vacuum cleaner Feb 2, 1902 air conditioning; automated tea maker Mar 3, 1903 electrocardiogram; first powered flight Apr 5, 1904 radar; tea bags May 6, 1905 plastic Jun 7, 1906 radio broadcasting Jul 8, 1907 electric washing machine Aug 9, 1908 coffee filter; water coolers; paper cups Sep 10, 1913 crossword puzzles; bras; zips May 31, 1916 sonar Jul 13, 1920 hair dryers; kiss-proof lipstick Feb 4, 1921 robots; insulin Feb 4, 1924 frozen food Feb 4, 1925 television Feb 4, 1927 ‘Talkies’ at the movies Feb 4, 1928 penicillin Feb 4, 1930 jet engine; mechanical toothbrushes; Scotch tape Feb 4, 1932 parking meter Feb 4, 1935 electric guitar Feb 4, 1936 sun tan lotion; electric blanket Feb 4, 1938 ballpoint pen; photocopying Feb 4, 1939 helicopters Feb 4, 1942 first nuclear reactor built; Feb 4, 1946 microwave ovens; automation; Bikini; Tupperware; Tupperware Parties Feb 4, 1947 transistors; holograms; mobile phones Feb 4, 1948 frisbees; velcro; general purpose computers; contact lenses Feb 4, 1950 credit cards Feb 4, 1951 Tetrapak cartons of milk Feb 4, 1952 wide-screen cinema Feb 4, 1953 transistor radio Feb 4, 1954 solar cell Feb 4, 1955 atomic clock Feb 4, 1956 video tape recorder Feb 4, 1957 satellite Feb 4, 1958 video games; modems Feb 4, 1959 car seat belts Feb 4, 1960 cardiac pacemaker; laser Feb 27, 1961 Man in Space Feb 5, 1964 computer mouse; miniskirt Feb 5, 1965 optical disc; bay buggy; HTML Feb 5, 1966 pocket television Feb 5, 1967 portable calculator Feb 5, 1968 biometrics; Workmate; artificial heart Feb 5, 1969 the Internet; cash dispenser Feb 5, 1970 LED and LCD’s Feb 5, 1971 floppy disc Feb 5, 1973 barcodes; post-it-note; car airbags Feb 5, 1975 personal computer; laser printer Feb 5, 1977 MRI scanner; inkjet printer Feb 5, 1979 first personal stereo Feb 5, 1980 Hepatitis B vaccine Feb 5, 1987 disposable contact lenses Feb 5, 1989 World Wide Web