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Results tagged with uspto
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user 16007
United States Patent and Trademark Office, the body which issues patents in the USA.
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Patent Number suffix A1 / B2 etc.
On some patent numbers I see an "A1" / "A2" / "B2" etc. suffix after the actual patent number
e.g. "USxxxxxxxxx B2" or "WOxxxxxxxx A1" etc.
What do these suffixes mean? Is there a key somewhere tha …
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