Patent classifications
A
HUMAN NECESSITIES
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A61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
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A61K
PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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49/00
Preparations for testing in vivo
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A61K49/22
Echographic preparations; Ultrasonic imaging preparations
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A61K49/222
characterised by a special physical form, e.g. emulsions, liposomes
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A61K49/225
Microparticles, microcapsules
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