On December 16, Apex Microelectronics announced that it has released new replacement chips for A4 monochrome printers and MFPs from OKI and Xerox. The company’s OKI replacement chips are for use in cartridges for OKI’s A4 monochrome single-function B412dn, B432dn, and B512dn and monochrome multifunction MB492dn, MB472w, and MB562dnw sold in the United States, Europe,