Can multiple attorneys be appointed in a patent application?

Yes, multiple attorneys can be appointed in a patent application. According to MPEP 402.02:

More than one attorney, agent, or other party may be appointed as representative of the applicant or owner.

When appointing multiple attorneys:

• Use the appropriate power of attorney form (PTO/AIA/82 for applications filed on or after September 16, 2012, or PTO/SB/81 for earlier applications).
• List all attorneys or agents to be appointed.
• Specify if they are to act independently or as a team.

To learn more:

• power of attorney
• multiple attorneys
• patent application