General Information by Subject - I
| Subject | Telephone | Fax | TTY |
| Information Center, Scientific and Technical (STIC) | 571-272-3547 | 571-273-0048 | |
| Information Contacts Telephone Directory
(to request a copy) |
800-786-9199 571-272-1000 |
571-272-9950 | |
| Initial Patent Examination | |||
| Customer Service | 571-272-4000 | 571-273-8300 | |
| Fax Response to Notice to File Missing Parts (drawings may not be submitted by fax) |
571-273-8300 | ||
| Initial Trademark Review | 800-786-9199 | 571-273-9250 | |
| Innovation Station Child Development Center | 571-272-2880 | ||
| Inspection of Patent Files | 703-308-2733 | ||
| Intent to Use Applications, Trademarks | 571-272-9550 | 571-273-9550 | |
| Interferences | 571-272-9797 | ||
| International Liaison Staff | 571-272-7850 | 571-273-0093 | |
| International Patent (PCT) Application Information | 571-272-4300 | 571-273-0419 | |
| International Patent Classification (IPC) | 571-272-7807 | ||
| Inventors Assistance Center (IAC) | 571-272-1000 800-786-9199 |
571-272-9950 | |
| Inventors Assistance Program | 866-767-3848 | ||
| Issue Fee
See Application Assistance Unit |
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