Patent classifications
A
HUMAN NECESSITIES
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A61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
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A61G
TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
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A61G1/04
Parts, details or accessories, e.g. head-, foot-, or like rests specially adapted for stretchers
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A61G1/0565
simultaneously folding, e.g. parallelogram structures
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A61G1/0567
folding in x-shape
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