San Francisco Public Library

Common Law Trademark

General Sources of Business Names

Search general business directories to find out what names are in use.

California Businesses

California Business Search - CA corporations (including nonprofits), limited partnerships (LP) and limited liability companies (LLC). Also try the Name Availability searches.

Fictitious Business Name (FBN) Search

San Francisco Fictitious Business Name Search.

Print Directories of Local Businesses

[See Local Company Research Resources for a more complete list of local sources]

General Sources of Brand & Product Names

Sources for Specific Goods & Services

The Business, Science & Technology Center has many print trade directories for a wide range of industries. 

Additional Suggestions