What changes were made to USPTO kind codes in 2001?
In 2001, the USPTO made significant changes to its kind codes system. According to MPEP 901.04(a), several key changes were implemented: Some kind codes were discontinued as of January 2, 2001: Code ‘A’ for Patents was replaced by B1 or B2 Code ‘P’ for Plant Patents was replaced by P2 or P3 Codes ‘B1, B2,…
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