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EnlargeDownload Link Citation: Thomas Edison's patent drawing and application for an improvement in electric lamps, patented January 27, 1880; Records of the Patent and Trademark Office; Record Group 241; National Archives. View All Pages in the National Archives Catalog View Transcript On January 27, 1880, Thomas Edison received the historic patent embodying the principles of his incandescent lamp that paved the way for the universal domestic use of electric light.| National Archives
EnlargeDownload Link Citation: The House Joint Resolution Proposing the 15th Amendment to the Constitution, December 7, 1868; Enrolled Acts and Resolutions of Congress, 1789-1999; General Records of the United States Government; Record Group 11; National Archives View All Pages in the National Archives Catalog View Transcript Passed by Congress February 26, 1869, and ratified February 3, 1870, the 15th Amendment granted African American men the right to vote.| National Archives