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Introduction
The origins of patents for inventions, and early conceptions of the invention : pre-1623
The requirement for an invention in the pre-modern era of mechanical and chemical manufacture : 1623 to 1882
The requirement for an invention in the modern era of 'new' technologies : 1883 to 1976
The EPC requirement for an invention in its interpretive context
Article 52(2) and (3) of the EPA according to the European Patent Office
Inherent patentability in UK law since 1977
Conclusion.

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