152,645 Contributions. 1  This circuit is used in most electronic digital computers ever built & was invented in 1918 (patent GB148582). 2  Time is power of Business. 3  This circuit is used in most electronic digital computers ever built & was invented in 1918 (patent GB148582).
There were many people who had a hand in âinventingâ the vacuum cleaner. Every invention and patent has made minor improvements and has evolved into what we use today. Many people are under the assumption that H. Cecil Booth, a British engineer, was the first person to patent the vacuum cleaner in 1901.[1] The first person to patent a version of the vacuum cleaner is Daniel Hess, from West Union, Iowa, in 1860.
James Spangler. James Spangler invented a portable electric vacuum cleaner-the Hoover Vacuum Cleaner. In 1907, James Spangler, a janitor working in a Canton, Ohio department store, deduced that the carpet sweeper he used on the job was the source of his cough.illiam H. Hoover was so impressed with the vacuum cleaner that his wife bought that Hoover bought into Spangler's business and patents, becoming the president of the Electric Suction Sweeper Company. William Hoover renamed the company the Hoover Company in 1922.