Carl Zeiss Meditec AG
Lists Iran Negar – Planetarium, Marestan Co. Ltd, Optical Trading Center, Pishgaman Sanate Taimaz Co. and Valatec Engineering Company as distributors in Tehran, Iran.
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Over the last three presidential administrations, the United States government has granted Carl Zeiss Meditec 22 special licenses to do business in Iran. (New York Times, "Companies with Permission to Bypass Sanctions," 12/24/10)