Image processing patents

This page is about 2D image processing, 2D drawing, and patents on photo retouching.

UK upholding swpats before 1991?

• US4,602,286, filed 1983
• US4,633,416, filed 1985

A 1991 position paper from the League for Programming Freedom mentions that the UK equivalent patents had already been upheld in court. (Possibly helpful: Searching for patents#Finding equivalent patents from other patent offices)

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