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Donald R. Beckham
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Livermore, CA, US
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last 30 patents
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Patent Grant
Device and method for fabricating multi-layer tubing using a freely...
Patent number
4,409,172
Issue date
Oct 11, 1983
Thoratec Laboratories Corporation
Robert S. Ward
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL