CODE OF FEDERAL REGULATIONS 21
§ 807.65 Subpart D -- Exemptions.
Paragraphs {d} & {f} Excludes and exempts from regulation:
" (d) Licensed practitioners, including physicians, dentists, and optometrists, who manufacture or otherwise alter devices solely for use in their practice."
" (f) Persons who manufacture, prepare, propagate, compound, or process devices solely for use in research, teaching, or analysis, and do not introduce such devices into commercial distribution."