| free patents online advanced search | 1.43 | 0.9 | 5602 | 35 | 21 |
| free online patents search | 0.98 | 0.5 | 8368 | 26 | 36 |
| free online patents search website | 1.43 | 1 | 9906 | 34 | 81 |
| free patents online patent search | 0.77 | 0.8 | 1755 | 33 | 58 |
| us patents free online search | 0.76 | 1 | 7168 | 29 | 38 |
| free online patents search software | 0.7 | 0.7 | 1676 | 35 | 21 |
| patent free search online | 1.76 | 0.9 | 6310 | 25 | 62 |
| free online patents search service | 0.83 | 0.6 | 4227 | 34 | 92 |
| free online patents search by category | 1.71 | 0.3 | 2049 | 38 | 21 |
| free online patents search tool | 0.45 | 1 | 6974 | 31 | 18 |
| free online patents search engine | 1.43 | 0.8 | 5121 | 33 | 79 |
| us patent search advanced | 1.79 | 0.1 | 3368 | 25 | 1 |
| us patents online search | 1.83 | 0.1 | 5666 | 24 | 26 |
