United States Patent 4,189,501 Composition and method for the treatment of acne.
United States Patent 5,043,356 Composition and method for rejuvenating skin using vitamin A propionate. |
United States Patent 5,705,179 Tissue augmentation with perfluoropolyether compounds.
United States Patent 6,169,110 Rejuvenating the skin using a combination of vitamin A and alphahydroxy acids. |