A B-1 / B-2 visa is a non-immigrant visa that allows foreign nationals to travel to the United States temporarily for business (B-1), tourism (B-2), or a mix of both (B1/B2). https://www.boundless.com/immigration-resources/b-1-b-2-visi...
B1 Visa Subcategories and Special Cases
While the B-1 visa generally restricts employment and formal education, there are some exceptions under specific circumstances. These exceptions aren’t separate visa categories but annotations considered by the U.S. consular officers during the visitor visa application process.
Here’s a closer look at these special B-1 subcategories:
B-1 after-sales service visa: Companies selling equipment to the U.S. can leverage this visa to send assemblers for on-site service orders. Think of it as temporary technical support. These assemblers can perform tasks like installation, maintenance, and training, but the assembly work must be done by U.S. personnel.
B-1 in place of H-1B visa (temporary project visa): Some professionals might be eligible for a B-1 visa for temporary projects in specific scenarios. This option can be viable when an H-1B visa, typically used for specialty occupations, might be challenging to obtain.
B-1 instead of H-3 visa (short-term training): Under certain conditions, the B-1 category can be used for brief in-house training sessions or further employee education. It allows for skills development without needing a dedicated H-3 visa designed for trainee positions.
IMPORTANT! These B1 business visa exceptions have strict requirements. Working with an immigration service provider or lawyer is highly recommended to determine if a particular B-1 visa category fits your situation.
https://www.immigrationdirect.com/guides/b1-b2-visitor-visa/