The SciencesMushroom Piling Patent Valid, Unfair Competition Suppressed and moreBy Sylvester J. Liddy on November 1, 1932AdvertisementABOUT THE AUTHOR(S)Recent Articles by Sylvester J. LiddyTracking Down Your Trade Mark TitleForeign Patent Licensing Corporations, Vapex Mark UpheldChicken Capsules in Patent Suit, Position of Trade Mark and more