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20.1 Date and Number - Patent Cooperation Treaty
§ 20.1 Date and Number
(a) Upon receipt of papers purporting to be an international application, the receiving Office shall indelibly mark the date of actual receipt on the request of each copy received and the international application number on each sheet of each copy received.
(b) The place on each sheet where the date or number shall be marked, and other details, shall be specified in the Administrative Instructions.
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