PTO means Patent and Trademark Office U.S. Department of Commerce in FDA
Similar to PTO
AAMI - American Association for Medical InstrumentationAANN - American Association of Neurosciences Nurses
AANS - American Association of Neurological Surgeons
AAO - American Academy of Ophthalmology
AAP - American Academy of Pediatrics
AAPHP - American Association of Public Health Physicians
AAPM - American Association of Physicists in Medicine
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