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Neither of Latimer's two filament-related patents in 18 were among the most important innovations, nor did they make the light bulb last longer, nor is there reason to believe they were adopted outside Hiram Maxim's company where Latimer worked at the time. This operation was not the first of its type: Henry Dalton of St.(He was not hired by Edison's company until 1884, primarily as a draftsman and an expert witness in patent litigations). Louis performed a nearly identical operation two years earlier, with the patient fully recovering.

Detailed evidence: The not-so-real Mc Coy Also see The Fake Mc Coy and Did Somebody Say Mc Trash? (See historical notes on plasma use.) Charles Drew was not responsible for any breakthrough scientific or medical discovery; his main career achievement lay in supervising or co-supervising major programs for the collection and shipment of blood and plasma. Banneker assisted Andrew Ellicott in the survey of the federal territory, but played no direct role in the actual planning of the city.Most interesting were the reasons they made their choices.What are other people's choices for the most important technologies of the 1900s and your reasons for choosing them?More than 50 years later came surgery on the open heart, pioneered by John Lewis, C. In the US, English-born Leo Daft used a third-rail system to electrify the Baltimore & Hampden lines in 1885.Walton Lillehei (often called the "father of open heart surgery") and John Gibbon (who invented the heart-lung machine). The first electrically powered subway trains, which debuted in London in the autumn of 1890, likewise drew power from a third rail. Granville Woods prevented railway accidents and saved countless lives by inventing the train telegraph (patented in 1887), which allowed communication to and from moving trains? The earliest patents for train telegraphs go back to at least 1873.

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There is no evidence that any commercial railway telegraph based on Granville Woods's patents was ever built.