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Patent Number
Product Models
US7451614
HB24FS, HC24FS, CR24F, HC48WW, HC48RW, HP48WW  DZS36, DZS60, CR30R, CR24R, CR24D, CC24D, HP24ZS, HP24ZO, HP24DS, HP24DO, HP24CS, HP24CO
US8066257
630SS, 630PC, 630SSTF, 650SS, 650SSTF, 680SS, 690SS
US8656952
650SS, 650SSTF, 690SS
USD790914
630SS, 630PC, 630SSTF, 650SS, 650SSTF, 680SS, 690SS