G A Smith patent for colour kinematography

Late in 1906 George Albert Smith was ready to file for a patent on a two-colour film system on which he had been working, with the backing of Charles Urban, since 1904. This is the technology that later became known as Kinemacolor after Urban bought out Smith's rights. As can be seen on the final page, the patent was revoked on 26 April 1915 by order of the High Court, following a House of Lords ruling in favour of William Friese-Greene, who contested that the Smith patent was invalid because a two-colour system could not produce the true natural colour that was claimed.

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