Crowell & Moring added corporate attorneys John J. Koenigsknecht and David S. Stone as partners. Both join from Neal Gerber Eisenberg.Koenigsknecht advises U.S. public and private companies and acts as U.S. counsel for international clients on complex corporate deals. He represents companies on corporate matters, mergers and acquisitions, cross-border transactions, exchange matters, securities offerings, cross-border offerings and other capital-building transactions. At Crowell, Koenigsknecht will serve as co-chair of …