inventions 1900 to 1990 By jia ming Aug 30, 1901 vacuum cleaner Nov 26, 1902 air conditioning; automated tea maker Dec 17, 1903 electrocardiogram; first powered flight Jan 1, 1904 radar; tea bags Jan 1, 1905 plastic Oct 25, 1906 radio broadcasting Jan 1, 1907 electric washing machine Dec 15, 1908 coffee filter; water coolers; paper cups Dec 21, 1913 crossword puzzles; bras; zips Jan 1, 1916 sonar Jan 1, 1920 hair dryers; kiss-proof lipstick Jan 1, 1921 robots; insulin Jan 1, 1924 frozen food Jan 1, 1925 television Jan 1, 1926 aerosol sprays Oct 1, 1927 Talkies’ at the movies Sep 3, 1928 penicillin Jan 1, 1930 jet engine; mechanical toothbrushes; Scotch tape Jan 1, 1932 parking meter Jan 1, 1935 electric guitar Jan 1, 1936 sun tan lotion; electric blanket Jun 10, 1938 ballpoint pen; photocopying Jan 1, 1939 helicopters Dec 2, 1942 first nuclear reactor built Jan 1, 1946 microwave ovens; automation; Bikini; Tupperware; Tupperware Parties Jan 1, 1947 transistors; holograms; mobile phones Jan 1, 1948 frisbees; velcro; general purpose computers; contact lenses Jan 1, 1950 credit cards Jan 1, 1951 Tetrapak cartons of milk Jan 1, 1952 wide-screen cinema Jan 1, 1953 transistor radio Jan 1, 1954 solar cell Jan 1, 1955 atomic clock Jan 1, 1956 video tape recorder Jan 1, 1957 satellite Jan 1, 1958 video games; modems Jan 1, 1959 car seat belts Jan 1, 1960 cardiac pacemaker; laser Jan 1, 1961 Man in Space Jan 1, 1964 computer mouse; miniskirt Jan 1, 1965 optical disc; bay buggy; HTML Jan 1, 1966 pocket television Jan 1, 1967 portable calculator Jan 1, 1968 biometrics; Workmate; artificial heart Jan 1, 1969 the Internet; cash dispenser Jan 1, 1970 LED and LCD’s Jan 1, 1971 floppy disc Jan 1, 1973 barcodes; post-it-note; car airbags Feb 8, 1975 personal computer; laser printer Jan 1, 1977 MRI scanner; inkjet printer Jan 1, 1979 first personal stereo Jan 1, 1980 Hepatitis B vaccine Feb 8, 1987 disposable contact lenses Jan 1, 1989 World Wide Web