| Invention necessity | 19 |
| Invention of 1620 | 17 |
| Invention of 1785 | 17 |
| Invention of 1824 | 17 |
| Invention of 1856 | 17 |
| Invention of 1860 | 17 |
| Invention of 1868 | 17 |
| Invention of 1885 | 17 |
| Invention of 1887 | 17 |
| Invention of 1888 | 17 |
| Invention of 1900 | 17 |
| Invention of 1922 | 17 |
| Invention of 1945 | 17 |
| Invention of 200's B.C. | 27 |
| Invention of a sort | 19 |
| Invention of Anders Celsius | 27 |
| Invention of Arthur Wynne | 25 |
| Invention of Arthur Wynne: 1913 | 31 |
| Invention of Hermes, supposedly | 31 |
| Invention of I891 | 17 |
| Invention of Morton, Krum et al. | 32 |
| Invention of new words | 22 |
| Invention of the 1830's | 27 |
| Invention of World War I | 24 |
| Invention papers | 16 |
| Invention patented in 1858 | 26 |
| Invention patented on March 14, 1794 | 36 |
| Invention preceder | 18 |
| Invention preceders | 19 |
| Invention protection | 20 |
| Invention seed | 14 |
| Invention spawned by a pie tin | 30 |
| Invention start | 15 |
| Invention starter | 17 |
| Invention that prompted NBC to adopt the peacock logo | 53 |
| Invention that's not thought highly of | 42 |
| Invention's beginning | 25 |
| Invention's origin | 22 |
| Invention, of a sort | 20 |
| Invention, so to speak | 22 |
| Inventions | 10 |
| Inventions, so to speak | 23 |
| Inventive | 9 |
| Inventive account | 17 |
| Inventive cubist? | 17 |
| Inventive fellow | 16 |
| Inventive initials | 18 |
| Inventive monogram | 18 |
| Inventive monogram? | 19 |
| Inventive one | 13 |
| Inventive sort | 14 |
| Inventive sort? | 15 |
| Inventive sorts | 15 |
| Inventive sorts? | 16 |
| Inventive Swiss painter | 23 |
| Inventive thought | 17 |
| Inventive thoughts | 18 |
| Inventive type | 14 |
| Inventive type? | 15 |
| Inventive Vermont blacksmith of the 19th century | 48 |
| Inventive Whitney | 17 |
| Inventiveness of a sort | 23 |
| Inventor | 8 |
| Inventor after whom a Yale residential college is named | 55 |
| Inventor and electricity pioneer (the coil named for him is twisted up in four answers) | 87 |
| Inventor and oft-cited eponym for a phrase meaning "the genuine article" | 82 |
| Inventor Berliner | 17 |
| Inventor center? | 16 |
| Inventor De Forest | 18 |
| Inventor depicted in "The Prestige" | 45 |
| Inventor dubbed "the patron saint of modern electricity" | 66 |
| Inventor Edison | 15 |
| Inventor Edwin's cloak (or painting) | 40 |
| Inventor Elias | 14 |
| Inventor Elias and others | 25 |
| Inventor Elias ___ | 18 |
| Inventor Elisha | 15 |
| Inventor Elisha and patriot James | 33 |
| Inventor Evinrude | 17 |
| Inventor famed for plows | 24 |
| Inventor for whom a N.J. township is named | 42 |
| Inventor Franklin | 17 |
| Inventor friend of Henry Ford | 29 |
| Inventor from Budapest | 22 |
| Inventor from Hartford | 22 |
| Inventor from Menlo Park | 24 |
| Inventor Fulton | 15 |
| Inventor George | 15 |
| Inventor given a gold medal by Titanic survivors | 48 |
| Inventor hired by Westinghouse | 30 |
| Inventor Howe | 13 |
| Inventor James | 14 |
| Inventor Jethro | 15 |
| Inventor Jethro and namesakes | 29 |
| Inventor Lee ___ | 16 |
| Inventor Linus: 1821-68 | 23 |
| Inventor McCormick | 18 |
| Inventor monogram | 17 |
| Inventor Morse | 14 |
| Inventor Nikola | 15 |