These printers use the C4193A cartridge:
HP Color LaserJet 4500
HP Color LaserJet 4500 DN
HP Color LaserJet 4500 HDN
HP Color LaserJet 4500 N
HP Color LaserJet 4500 Series
HP Color LaserJet 4550
HP Color LaserJet 4550 DN
HP Color LaserJet 4550 HDN
HP Color LaserJet 4550 N
HP Color LaserJet 4550 Series
HP LaserJet 4550 ODN
Canon C LBP 400-4 Color
Canon EP 83
Canon LBP 460 PS
Canon LBP 2040
Canon LBP 2050