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| free online patent search | 0.69 | 0.2 | 513 | 25 | 3 |
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| free online patents search engine | 1.62 | 0.3 | 5334 | 33 | 33 |
| free online patents search by country | 0.66 | 0.2 | 4419 | 37 | 44 |
| free online patents search by keyword | 0.48 | 0.4 | 6844 | 37 | 36 |
| free online patents search tool | 0.69 | 0.1 | 2947 | 31 | 94 |
| free online patents search portal | 0.56 | 0.7 | 3708 | 33 | 41 |
| free online patents search system | 0.31 | 0.6 | 7761 | 33 | 51 |
| free online patents search by date | 1.15 | 0.5 | 7905 | 34 | 67 |
| free online patents search service | 0.53 | 0.4 | 1804 | 34 | 73 |
| free online patents search website | 1.94 | 0.2 | 5940 | 34 | 38 |
| free online patents search database | 1.31 | 0.5 | 8206 | 35 | 94 |
| free online patents search platform | 1.78 | 0.8 | 1742 | 35 | 88 |
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| us free patent search online | 0.61 | 0.5 | 8709 | 28 | 85 |
| patent search uk online free | 0.65 | 0.6 | 6353 | 28 | 42 |
