| Answer | Crossword Clue |
|---|---|
| REGD | Govt.-certified, as a patent |
| GLENNMILLER | Musician with the first record formally certified as a million-seller |
| REGD | Recorded, as a patent (abbr.) |
| BERN | City where Albert Einstein worked as a patent-office clerk |
| NSA | Govt. org. with a forerunner known as the Black Chamber |
