Maryland ranks #22 among US states for total patents filed all time, with 157,723 patents from 35,612 inventors across 456 cities. On a per-capita basis that is 25.5 patents per 1,000 residents, a standard benchmark for comparing state-level R&D intensity.
Top Cities in Maryland All Time
| Rank | City | Patents | Inventors |
|---|---|---|---|
| #1 | Baltimore, MD | 20,225 | 4,923 |
| #2 | Rockville, MD | 10,181 | 2,038 |
| #3 | Bethesda, MD | 9,935 | 2,269 |
| #4 | Gaithersburg, MD | 8,726 | 1,746 |
| #5 | Silver Spring, MD | 7,295 | 1,812 |
| #6 | Columbia, MD | 6,333 | 1,501 |
| #7 | Potomac, MD | 6,205 | 998 |
| #8 | Ellicott City, MD | 5,689 | 1,185 |
| #9 | Germantown, MD | 4,828 | 905 |
| #10 | Frederick, MD | 3,817 | 816 |
| #11 | Timonium, MD | 2,584 | 440 |
| #12 | Annapolis, MD | 2,385 | 661 |
| #13 | Bel Air, MD | 2,363 | 482 |
| #14 | Laurel, MD | 2,229 | 605 |
| #15 | Severna Park, MD | 1,835 | 364 |
| #16 | Cockeysville, MD | 1,657 | 330 |
| #17 | Towson, MD | 1,645 | 347 |
| #18 | North Potomac, MD | 1,537 | 272 |
| #19 | Elkton, MD | 1,372 | 292 |
| #20 | College Park, MD | 1,314 | 353 |
| #21 | Kensington, MD | 1,247 | 263 |
| #22 | Owings Mills, MD | 1,129 | 245 |
| #23 | Olney, MD | 1,100 | 207 |
| #24 | Clarksville, MD | 1,013 | 200 |
| #25 | Chevy Chase Section Five, MD | 1,008 | 42 |