1498 – Toothbrush invented in China using boar bristles.
1721 – Dr. Zabdiel Boylston gives 1st smallpox inoculations in America.
1797 – Charles Newbold patents 1st cast-iron plow, though farmers fear effects of iron on soil.
1848 – 1st pure food law enacted in US.
1870 – 1st section of Atlantic City (NJ) Boardwalk opens.
1900 – Dr. Walter Reed begins research that beats Yellow Fever.
1919 – NY Daily News begins publishing.
1934 – FDR signs Federal Credit Union Act, establishing Credit Unions.
1945 – United Nations Charter signed by 50 nations in San Francisco.
1958 – Vanguard SLV-2 launched for Earth orbit (failed).
1968 – Iwo Jima & Bonin Islands returned to Japan by US.
1971 – “Man of La Mancha” closes at ANTA Washington Square Theater, NYC, after 2329 performances.
1974 – The Universal Product Code is scanned for the first time to sell a package of Wrigley’s chewing gum at the Marsh Supermarket in Troy, Ohio.
1977 – Elvis Presley sings in Indianapolis, the last performance of his career.
1989 – Supreme Court rules 16 year olds can receive death penalty.
1991 – Charlotte Hornets make Larry Johnson of UNLV, NBA’s #1 draft pick.
1992 – Supreme Court rules fund soliciting can be banned at airports.
1997 – The US Supreme Court rules that the Communications Decency Act violates the First Amendment.
2008 – The US Supreme Court rules in District of Columbia v. Heller that the ban on handguns in the District of Columbia is unconstitutional.
2015 – US Supreme Court rules 5-4 same-sex marriage is a legal right across all US states.