| Answer | Crossword Clue |
|---|---|
| TEL | 1876 invention: Abbr. |
| TEL | Invention of 1876: Abbr. |
| TELEPHONE | Invention of 1876. |
| PHONE | Use an invention of 1876. |
| CEN | 1776-1876: Abbr. |
| TEL | Bell's invention: Abbr. |
| DST | Franklin invention: Abbr. |
| TEL | Bell invention: Abbr. |
| DST | Ben Franklin invention: Abbr. |
| TEL | A. G. Bell's invention: Abbr. |
| PATD | Protected, as an invention (abbr.) |
