Patent classifications
A
HUMAN NECESSITIES
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A61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
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A61B
DIAGNOSIS; SURGERY; IDENTIFICATION
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3/00
Apparatus for testing the eyes; Instruments for examining the eyes
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A61B3/02
Subjective types, i.e. testing apparatus requiring the active assistance of the patient
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A61B3/06
for testing light sensitivity, e.g. adaptation; for testing colour vision
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A61B3/066
for testing colour vision
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