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  2. The Greatest American Inventions of the Past 50+ Years - AOL

    www.aol.com/greatest-american-inventions-past-50...

    For more American inventions and innovators looking to make a difference in the world, check out 26 Companies That Are Doing Good Deeds With Your Dollars. Maksim Toome/shutterstock

  3. 30+ Companies That Changed America - AOL

    www.aol.com/30-companies-changed-america...

    DuPont. 1802. Products that make life easier are the forte of DuPont, creator of chemicals and science-based goods. Thanks to the conglomerate, we have construction materials, personal protective ...

  4. List of inventors - Wikipedia

    en.wikipedia.org/wiki/List_of_inventors

    Heron (c. 10–70), Roman Egypt – usually credited with invention of the aeolipile, although it may have been described a century earlier; John Herschel (1792–1871), UK – photographic fixer (hypo), actinometer; Harry Houdini (1874–1926) U.S. – flight time illusion; Heinrich Hertz (1857–1894), Germany – radio telegraphy ...

  5. List of largest companies in the United States by revenue

    en.wikipedia.org/wiki/List_of_largest_companies...

    The Fortune 500 list of companies includes only publicly traded companies, also including tax inversion companies. There are also corporations having foundation in the United States, such as corporate headquarters, operational headquarters and independent subsidiaries. The list excludes large privately held companies such as Cargill and Koch ...

  6. Timeline of United States inventions (1890–1945) - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_United_States...

    According to Encyclopædia Britannica, the polygraph was on its 2003 list of the 325 greatest inventions. [172] 1921 Flowchart. A flowchart is common type of chart, representing an algorithm or process, showing the steps as boxes of various kinds, and their order by connecting these with arrows.

  7. Timeline of United States inventions (after 1991) - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_United_States...

    In 1641, the first patent in North America was issued to Samuel Winslow by the General Court of Massachusetts for a new method of making salt. [ 1 ] [ 2 ] [ 3 ] On April 10, 1790, President George Washington signed the Patent Act of 1790 (1 Stat. 109) into law which proclaimed that patents were to be authorized for "any useful art, manufacture ...