In about 1991, a German by the name of Bernard Docter bought at least some of the assets of the former Zeiss Jena operation in the former East Germany. His big products were rifle scopes and binoculars. Under his management, Docter Optics were introduced into the US marketplace.

Alas, Herr Docter died in 1995, and the company went bankrupt shortly after that. As I now recall, there was some mysteriousness about his death. Anyway, a part of the company producing scopes and binoculars was taken over by another group and has apparently been pretty successful with the operation.

You can find a lot of information by simply googling Docter Optics.

Tom