Part 41 — Practice Before the Patent Trial and Appeal Board

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• Subpt. A General Provisions §§41.1 to 41.20
• Subpt. B Ex Parte Appeals §§41.30 to 41.54
• Subpt. C Inter Partes Appeals §§41.60 to 41.81
• Subpt. D Contested Cases §§41.100 to 41.158
• Subpt. E Patent Interferences §§41.200 to 41.208