| 3 | 1901 | - 1901: Theodore Roosevelt president of the USA 1901-1909. Theodore Roosevelt, vice president under William McKinley, sworn in as president upon death of McKinley.
- 1901: King Camp Gillette invents the double-edged safety razor.
- 1901: The first radio receiver, successfully received a radio transmission.
- 1901: Hubert Booth invents a compact and modern vacuum cleaner.
- 1901: Edward VII. Ruler of England 1901-1910. House of Saxe-Coburg and Gotha: Eldest son of Victoria, married Alexandra, Princess of Denmark.
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1899 - 1901 (2 years)