Delaware ranks #34 among US states for total patents filed all time, with 41,474 patents from 7,163 inventors across 77 cities. On a per-capita basis that is 41.9 patents per 1,000 residents, a standard benchmark for comparing state-level R&D intensity.
Top Cities in Delaware All Time
| Rank | City | Patents | Inventors |
|---|---|---|---|
| #1 | Wilmington, DE | 20,085 | 3,182 |
| #2 | Newark, DE | 7,802 | 1,550 |
| #3 | Hockessin, DE | 4,279 | 555 |
| #4 | Middletown, DE | 1,732 | 298 |
| #5 | Nonatum Mills, DE | 1,560 | 198 |
| #6 | Bear, DE | 1,306 | 286 |
| #7 | Dover, DE | 1,050 | 234 |
| #8 | New Castle, DE | 689 | 179 |
| #9 | Claymont, DE | 588 | 95 |
| #10 | Lewes, DE | 323 | 75 |
| #11 | Seaford, DE | 315 | 80 |
| #12 | Townsend, DE | 244 | 36 |
| #13 | Milford, DE | 177 | 62 |
| #14 | Smyrna, DE | 115 | 43 |
| #15 | Bethany Beach, DE | 109 | 31 |
| #16 | Georgetown, DE | 93 | 3 |
| #17 | Marydel, DE | 89 | 1 |
| #18 | Milton, DE | 87 | 22 |
| #19 | Centreville, DE | 81 | 2 |
| #20 | Millsboro, DE | 65 | 24 |
| #21 | Rehoboth Beach, DE | 63 | 29 |
| #22 | Wyoming, DE | 59 | 11 |
| #23 | Rockland, DE | 53 | 7 |
| #24 | Clayton, DE | 49 | 16 |
| #25 | Montchanin, DE | 43 | 7 |