The Jarrett Firm, LLC | Patrick Jarrett
Your question is unclear as to whether you wish to extend your stay or your father's. Depending on the facts of your situation, you can file for an extension on his B-1. Visit uscis.gov for more information on how to obtain an extension of stay. You may be able to change status if you fit into another nonimmigrant visa category. In order to determine whether you can change your status would require much more information. If you feel you need assistance, you should speak with an immigration attorney. Feel free to contact me directly if you have any other questions.
Answer Applies to: Georgia