How are Defensive Publications numbered?
Defensive Publications have had different numbering systems over time. According to MPEP 901.06(d):
“Distinct numbers are assigned to all Defensive Publications published December 16, 1969 through October 1980. For Defensive Publications published on and after November 4, 1980, a different numbering system is used.”
For older Defensive Publications, there is a conversion system:
“A conversion table from the application serial number to the distinct number for all Defensive Publications published before December 16, 1969 appears at 869 O.G. 687.”
These distinct numbers are crucial for official references and document copy requirements in patent research and examination.
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