U.S. Patent and Trademark Office Patents, 1790-1909

Ancestry has made available a database contains invention patents granted from 1790-1909 by the United States Patent and Trademark Office (USPTO).

The database contains:

• Patent number
• Current U.S. Classification
• Name of patentee
• Patent date
• Patent place

In addition there are images of the patent documentation when available.

A search on Canada as a keyword found 14,180 hits.