PTO means Patent and Trademark Office U.S. Department of Commerce in FDA
Similar to PTO
AAHA - American Animal Hospital AssociationAAI - American Association of Immunologists
AALAS - American Association for Laboratory Animal Science
AAMI - American Association for Medical Instrumentation
AANN - American Association of Neurosciences Nurses
AANS - American Association of Neurological Surgeons
AAO - American Academy of Ophthalmology
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