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. 2017 Mar 17;12(3):e0174203. doi: 10.1371/journal.pone.0174203

Table 6. Distribution of top 10 IPC classes (Source: WIPO).

IPC code Number Definition
A61F-013/00 409 Bandages or dressings (suspensory bandages A61F 5/40; radioactive dressings A61M 36/14); Absorbent pads (chemical aspects of, or use of materials for, bandages, dressings or absorbent pads A61L 15/00, A61L 26/00)
A61L-015/28 242 Polysaccharides or their derivatives
A61F-013/02 236 Adhesive plasters or dressings (A61F 13/06-A61F 13/15 take precedence; surgical adhesives or cements A61L 24/00)
A61K-035/78 165 Materials from plants
A61K-036/898 161 Liliaceae (Lily family), e.g. daylily, plantain lily, Hyacinth or narcissus
A61M-001/00 145 Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems (catheters A61M 25/00; tube connectors, tube couplings, valves or branch units, specially adapted for medical use A61M 39/00; devices for taking samples of bloodA61B 5/15; saliva removers for dentists A61C 17/06; filters implantable into blood vessels A61F 2/01)
A61L-015/44 110 Medicaments
A61K-036/889 110 Arecaceae, Palmae or Palmaceae (Palm family), e.g. date or coconut palm or palmetto
A61M-027/00 103 Drainage appliances for wounds, or the like (implements for holding wounds open A61B 17/02)
A61K-009/70 95 Web, sheet or filament bases