gptkbp:patentCitation
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gptkb:US_6,500,000_B1
gptkb:US_8,500,000_B2
US_5,000,000_A
US_9,000,000_B3
US_17,000,000_B11
US_10,000,000_B4
US_11,000,000_B5
US_12,000,000_B6
US_13,000,000_B7
US_14,000,000_B8
US_15,000,000_B9
US_16,000,000_B10
US_18,000,000_B12
US_19,000,000_B13
US_20,000,000_B14
US_7,500,000_C1
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