gptkbp:patentCitation
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gptkb:US_patent_4,321,692
gptkb:US_patent_4,321,695
gptkb:US_patent_4,321,702
gptkb:US_patent_4,321,703
gptkb:US_patent_4,321,696
gptkb:US_patent_4,321,710
gptkb:US_patent_4,321,708
gptkb:US_patent_4,321,704
gptkb:US_patent_4,321,714
gptkb:US_patent_4,321,711
gptkb:US_patent_4,321,717
gptkb:US_patent_4,321,694
gptkb:US_patent_4,321,715
gptkb:US_patent_4,321,719
gptkb:US_patent_4,321,700
US_patent_4,321,697
US_patent_4,321,698
US_patent_4,321,699
US_patent_4,321,705
US_patent_4,321,701
US_patent_4,321,706
US_patent_4,321,707
US_patent_4,321,709
US_patent_4,321,712
US_patent_4,321,713
US_patent_4,321,716
US_patent_4,321,718
US_patent_4,321,720
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