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  1. Light Bulb — 2021-08-09 21:56:27
    …n pursued his search for a more durable filament, he decided to use cotton to produce "parchmentised thread" and obtained British Patent 4933 on 27 November 1880. /* ~…
    …invalidated by the US Patent Office, on October 6, 1889, a judge ruled that the electric light improvement claim for "a filament of carbon of high resistance" was valid. Unfortunately further research exposed in A Streak of Luck by Robert Conot (1…
    …burners" or "rods" in an evacuated glass bulb. (...) In fact, Edison and his team did not find a commercially workable filament (bamboo) until more than 6 months after Edison filed the patent application Link to US espionage: http://historynewsne…

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