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Ian M. Threlfall
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Wigan, GB
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last 30 patents
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Patent Grant
Process for manufacturing photochromic articles
Patent number
4,851,471
Issue date
Jul 25, 1989
Pilkington Brothers P.L.C.
William R. Maltman
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...