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David D. Songstad
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Polk County, IA, US
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last 30 patents
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Patent Grant
Method for producing transgenic cereal plants
Patent number
5,736,369
Issue date
Apr 7, 1998
Pioneer Hi-Bred International, Inc.
Benjamin A. Bowen
C12 - BIOCHEMISTRY BEER SPIRITS WINE VINEGAR MICROBIOLOGY ENZYMOLOGY MUTATION...
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Patent Grant
Methods for maintaining sterility in plants
Patent number
5,717,129
Issue date
Feb 10, 1998
Pioneer Hi-Bred International, Inc.
David D. Songstad
C12 - BIOCHEMISTRY BEER SPIRITS WINE VINEGAR MICROBIOLOGY ENZYMOLOGY MUTATION...