Complex sentence: This would cause some early problems in Germany though as Zeiss complained that Nikon violated its trademarked camera, and so from 1963 to 1968 the Nikon F in particular was labeled'Nikkor'.
Split into simpler sentences: This would cause some early problems in Germany as Zeiss complained that Nikon violated its trademarked camera. From 1963 to 1968 the Nikon F in particular was therefore labeled'Nikkor'.