sentences:  Trading of materials however continued between plants.Agfa AG (Leverkusen), which saw major investment post war in 1952 as a wholly owned subsidiary of Bayer was subsequently merged with Gevaert based in Mortsel, Belgium in 1964 to form Agfa-Gevaert with Bayer subsequently acquiring full ownership of the merged company.Agfa-Gevaert film products continued to be sold under the AGFA 'rhombus' brand.