What is the central facsimile number for patent application-related correspondence at the USPTO?

The central facsimile number for patent application-related correspondence at the USPTO is (571) 273-8300. According to MPEP 502.01: All patent application related correspondence transmitted by facsimile must be directed to the central facsimile number, with a few exceptions below. The central facsimile number is (571) 273-8300. This central number should be used for most patent-related…

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