| Serial Number | 99378536 |
| Word Mark | DUOFON |
| Filing Date | Saturday, September 6, 2025 |
| Status | 641 - NON-FINAL ACTION - MAILED |
| Status Date | Monday, February 16, 2026 |
| Registration Number | 0000000 |
| Registration Date | NOT AVAILABLE |
| Mark Drawing | 4 - Illustration: Drawing with word(s) / letter(s) / number(s) in Block form |
| Published for Opposition Date | NOT AVAILABLE |
| Goods and Services | Internet telephony services; Telephony communication services; Computer telephony services; Computerised telephony services; Mobile telephony |
| Pseudo Mark | DUO FON |
| International Class | 038 - Services allowing people to communicate with another by a sensory means. |
| US Class Codes | 100, 101, 104 |
| Class Status Code | 6 - Active |
| Class Status Date | Saturday, September 6, 2025 |
| Primary Code | 038 |
| First Use Anywhere Date | Saturday, May 10, 2025 |
| First Use In Commerce Date | Tuesday, July 29, 2025 |
| Party Name | NOT AVAILABLE |
| Party Type | 10 - Original Applicant |
| Legal Entity Type | 01 - Individual |
| Address | San Carlos, CA 94070 |
| Event Date | Event Description |
| Saturday, September 6, 2025 | NEW APPLICATION ENTERED |
| Saturday, September 6, 2025 | APPLICATION FILING RECEIPT MAILED |
| Tuesday, January 27, 2026 | NEW APPLICATION OFFICE SUPPLIED DATA ENTERED |
| Wednesday, January 28, 2026 | ASSIGNED TO EXAMINER |
| Monday, February 16, 2026 | NON-FINAL ACTION WRITTEN |
| Monday, February 16, 2026 | NON-FINAL ACTION E-MAILED |
| Monday, February 16, 2026 | NOTIFICATION OF NON-FINAL ACTION E-MAILED |