Inventions 1900 to 1990 By Alba Martin Feb 6, 1901 vacuum cleaner Period: Feb 6, 1901 to May 9, 1989 Inventions 1900 to 1990 Mar 23, 1902 air conditioning; automated tea maker Sep 11, 1903 electrocardiogram; first powered flight Feb 4, 1904 radar; tea bags Apr 6, 1905 plastic May 3, 1906 radio broadcasting Feb 4, 1907 electric washing machine Dec 6, 1908 coffee filter; water coolers; paper cups Apr 1, 1913 crossword puzzles; bras; zips Jun 7, 1916 sonar Jul 21, 1920 hair dryers; kiss-proof lipstick Feb 4, 1921 robots; insulin Jan 16, 1924 frozen food Sep 23, 1925 television Jan 7, 1926 aerosol sprays Dec 30, 1927 ‘Talkies’ at the movies Aug 20, 1928 penicillin Aug 24, 1930 jet engine; mechanical toothbrushes; Scotch tape Nov 29, 1932 parking meter Feb 5, 1935 electric guitar May 7, 1936 sun tan lotion; electric blanket Jun 9, 1938 ballpoint pen; photocopying Mar 7, 1939 helicopters Jul 6, 1942 first nuclear reactor built; Feb 4, 1946 microwave ovens; automation; Bikini; Tupperware; Tupperware Parties May 12, 1947 transistors; holograms; mobile phones May 9, 1948 frisbees; velcro; general purpose computers; contact lenses Dec 31, 1950 credit cards Feb 4, 1951 Tetrapak cartons of milk Mar 5, 1952 wide-screen cinema Jul 1, 1953 transistor radio Feb 20, 1954 solar cell Aug 4, 1955 atomic clock Oct 11, 1956 video tape recorder Nov 23, 1957 satellite Aug 14, 1958 video games; modems May 6, 1959 car seat belts Feb 6, 1960 cardiac pacemaker; laser Feb 23, 1961 Man in Space Feb 3, 1964 computer mouse; miniskirt Jun 15, 1965 optical disc; bay buggy; HTML Feb 6, 1966 pocket television Feb 9, 1967 portable calculator Apr 21, 1968 biometrics; Workmate; artificial heart Sep 24, 1969 the Internet; cash dispenser Dec 6, 1970 LED and LCD’s Nov 23, 1971 floppy disc May 9, 1973 barcodes; post-it-note; car airbags Oct 6, 1975 personal computer; laser printer May 6, 1977 MRI scanner; inkjet printer Feb 22, 1979 first personal stereo Feb 6, 1980 Hepatitis B vaccine Dec 1, 1987 disposable contact lenses Feb 6, 1989 World Wide Web