en.wikipedia.org/wiki/United_States_Note

A United States Note, also known as a Legal Tender Note, is a type of paper money that was ... During 1861, the first year of the American Civil War, the expenses incurred by .... Like all U.S. currency, United States Notes were produced in a large sized .... Miller, and Davis, to reverse Hepburn, 5–4, in the 1871 cases Knox v.

en.wikipedia.org/wiki/Federal_Reserve_Note

Federal Reserve Notes, also United States banknotes or U.S. banknotes, are the banknotes currently used in the United States of America. Denominated in United States dollars, Federal Reserve Notes are printed by ..... Ruling on a lawsuit filed in 2002 (American Council of the Blind v. Paulson), on November 28, 2006, U.S.  ...

www.moneyfactory.gov/uscurrency.html

The BEP prints billions of dollars - referred to as Federal Reserve notes - each ... to a state-of-the-art manufacturing operation producing U.S. paper currency. ... use similar portraits and historical images to maintain an American look and feel.

www.uscurrency.gov/denominations/100

Hold the note to light to see an embedded thread running vertically to the left of the portrait. The thread is imprinted with the letters USA and the numeral 100 in ...

www.uscurrency.gov/denominations/20

Hold the note to light to see an embedded thread running vertically to the left of the portrait. The thread is imprinted with the text USA TWENTY and a small flag in  ...