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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9/00
Medicinal preparations characterised by special physical form
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A61K9/70
Web, sheet or filament bases; ; Films; Fibres of the matrix type containing drug
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A61K9/7023
Transdermal patches and similar drug-containing composite devices, e.g. cataplasms
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A61K9/703
characterised by shape or structure; Details concerning release liner or backing; Refillable patches; User-activated patches
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A61K9/7092
Transdermal patches having multiple drug layers or reservoirs, e.g. for obtaining a specific release pattern, or for combining different drugs
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