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.
The radiological findings of vacuum phenomenon with degenerative discs were described by Knutsson in 1942. Marr in 1955, found gas in the intervertebral disc in 2.036% of his cases, whereas Gershon-Cohen et al. found the vacuum phenomena in 20.8% of their cases. According to Gulati et al., the vacuum phenomenon is due to creation of space in a degenerative intervertebral or apophyseal joint due to motion, especially extension.