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We can get fulltext of US patent which was issued on 1790 through USPTO.

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We can get fulltext of US patent application from 1976 to 2000 through USPTO.

The main method of obtaining the original is searching full text database .

We can’t find images , such as graphs, maps, photos, and diagrams in the full-text database.

In ScienceDirect search,gro?t finds "grout" or "groat", but not "groundnut" or "grommet" .