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Lyman Ketcham
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Long Valley, NJ, US
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Patent Grant
Apparatus and process of convoluting thermoplastic tubing without t...
Patent number
4,427,616
Issue date
Jan 24, 1984
Simmonds Precision Products Inc.
Lyman Ketcham
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL