- Patent application: 2024-03-07
- Request for prior art search: 2024-12-12
- Prior art search report: 2025-01-17
- Notice of preliminary rejection: 2025-12-08
- Amendment and written argument: 2026-04-08
- Decision to grant: 2026-07-07
- Registration: 2026-07-20
- Title of invention: Tunnel ventilation measurement and control system
[Note] This case was registered after we responded to the notice of preliminary rejection.
LNB IP Law Firm