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| free patents online search | 1.91 | 0.5 | 909 | 26 | 3 |
| what is free patent title | 0.48 | 1 | 783 | 25 | 4 |
| free online patents search website | 1.34 | 0.8 | 7981 | 34 | 10 |
| online free patent search | 0.8 | 1 | 3239 | 25 | 52 |
| free online patents download | 1.31 | 0.4 | 2010 | 28 | 24 |
| free online patents search portal | 1.72 | 0.9 | 6393 | 33 | 52 |
| us patents online free | 0.22 | 0.5 | 270 | 22 | 53 |
| free online patents search by category | 0.57 | 0.8 | 9024 | 38 | 3 |
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