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Physical Medicine Instrument Co., a corporation, Indianapolis, Ind., and Eulalia Opperman, president, A. Henry Opperman, secretary-treasurer, and Homer A. Keller, vice president.
Hallmark Laboratories, Inc., a corporation, Custom Chemical Laboratories, a partnership, John Korabik, president of the corporation, Chicago, Ill., and Otto K. Benca, treasurer of the corporation and partner in the partnership, Cicero, Ill.