Bit of Zeiss trademark trivia. The Zeiss logo trademarked 24 June 1904 was fashioned with "Carl Zeiss" in the border of an achromatic doublet lens outline:
I have used a graphic outline which was a very common device but it is not the outline of a lens design, or at least not one you would want on your camera.
I have used a graphic outline which was a very common device but it is not the outline of a lens design, or at least not one you would want on your camera.