CFR > Title 21 - Food and Drugs > CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER H—MEDICAL DEVICES (parts 800 to 898) > PART 822—POSTMARKET SURVEILLANCE > SUBPART G—Records and Reports (§822.31 to §822.38) > 822.33—How long must we keep the records?