Patents as TopicGelatinInventionsIntellectual PropertyHistory, 18th CenturyBiotechnologyHistory, 17th CenturyHistory, 19th CenturyHistory, 20th CenturyGelatin Sponge, AbsorbableResearchEvolution, MolecularPhylogenyBiological EvolutionMatrix Metalloproteinase 2GelatinasesMatrix Metalloproteinase 9CapsulesPolygelinePlasma SubstitutesHydroxyethyl Starch DerivativesMetalloendopeptidasesMatrix Metalloproteinase InhibitorsHydrogelsMicrospheres