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A reference number is an eight (8) digit number string that is sent by the Patents Electronic Business Center via U.S. mail. In addition, for customers with U.S. residence only, the Patent EBC will attempt one phone call to deliver the Reference Number. The Reference Number will only be given if the requestor is reached, otherwise a message will be left that their Reference Number will be mailed and to contact the Patent EBC with any questions. (Format: 12345678)

 

 
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