Patent classifications
A
HUMAN NECESSITIES
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A61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
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A61D
VETERINARY INSTRUMENTS, IMPLEMENTS, TOOLS, OR METHODS
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17/00
Devices for indicating trouble during labour of animals; ; Methods or instruments for detecting pregnancy-related states of animals
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A61D17/002
for detecting period of heat of animals, i.e. for detecting oestrus
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