Copyright law in the United States is as old as the country itself and is a complex topic. For genealogists, a basic understanding of copyright is valuable as we negotiate our way through dozens of different types of source materials in the course of our research.
Archivist Peter Hirtle of Cornell University has put together a clear and helpful chart on this complex topic, available here.
The document is comprehensive and best downloaded, but for a preview of a portion of the document, see below:
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| © 2004-10 Peter B. Hirtle. Last updated 4 October, 2010 . Use of this chart is governed by the Creative Commons Attribution 3.0 License. |
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