Things You'll Need:
- Patent database or file archives
- Invention idea
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Step 1
If you live near Alexandria, Virginia, visit the United States Patent and Trademark Office. The USPTO facility has print archives of patents filed in the US as far back as 1790.
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Step 2
Check at your local library for a collection for microfilm containing all previous patents filed. Ask for help with the Reference department. Some libraries are Patent and Trademark Depository Libraries and keep in their holdings in microfilm or optical disc format.
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Step 3
Go online to the USPTO website, where you can search the database for patents that were granted by the Patent and Trademark Office since 1976. Or do a Google search for patents, where you can optionally use advanced search options limiting your results by such things as inventors and patent dates. See the Resources section for the links.
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Step 4
Wherever you search, to definitively find out if your invention idea is already patented, be creative with your patent search terms. What you call your invention idea may not be what it was called when it was patented. Look for variations on your idea as well as your specific idea, and check to see if there is a use (usage or utility) patent, also.











Comments
musicdeb said
on 5/9/2009 interesting article topic!