These printers use the 9901 cartridge:

Savin C 2228

Savin C 2820

Savin C 3224

Savin C 3828

Infotec IS C-2028

Infotec IS C-2432

Infotec IS C-2838

Nashuatec DSC 332

Nashuatec DSC 338

Rex DSC 332

Rex DSC 338

Ricoh Aficio 2228 C

Ricoh Aficio 2232 C

Ricoh Aficio 2238 C