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3582271
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Patent number 3,582,271
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Issue date Jun 1, 1971
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C30 - CRYSTAL GROWTH
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3486849
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Patent number 3,486,849
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Issue date Dec 30, 1969
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C30 - CRYSTAL GROWTH
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3476613
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Patent number 3,476,613
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Issue date Nov 4, 1969
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C30 - CRYSTAL GROWTH
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3421851
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Patent number 3,421,851
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Issue date Jan 14, 1969
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C30 - CRYSTAL GROWTH
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2837451
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Patent number 2,837,451
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Issue date Jun 3, 1958
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2829949
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Patent number 2,829,949
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Issue date Apr 8, 1958
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B82 - NANO-TECHNOLOGY
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2693406
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Patent number 2,693,406
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Issue date Nov 2, 1954
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B82 - NANO-TECHNOLOGY