Inventor
CHANG TIANHAI
CN16 patents
⚠️ This page may combine multiple inventors who share the name “CHANG TIANHAI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HUAWEI TECH CO LTD
13 patentsUS10547378B2Jan 28, 2020
Optical fiber status detection method, optical supervisory unit, and station
HUAWEI TECH CO LTD5 citations72
US8817823B2Aug 26, 2014
Method and device for time synchronization
HUAWEI TECH CO LTD2 citations61
US12055712B2Aug 6, 2024
Multi-focal-plane image generation apparatus, head-up display apparatus, related method, and device
HUAWEI TECH CO LTD0 citations60
US7564881B2Jul 21, 2009
Optical transmission module with digital adjustment and the adjusting method
HUAWEI TECH CO LTD4 citations60
US11711152B2Jul 25, 2023
Receiver, optical line terminal, and passive optical network system
HUAWEI TECH CO LTD0 citations57
US7580635B2Aug 25, 2009
Method, apparatus and system for optical communications
HUAWEI TECH CO LTD3 citations56
US11611816B2Mar 21, 2023
Service data processing method and device
HUAWEI TECH CO LTD0 citations51
US11381335B2Jul 5, 2022
Method and apparatus for spectrum defragmentation, device, and system
HUAWEI TECH CO LTD0 citations50
US10911137B2Feb 2, 2021
Optical amplifier apparatus, optical communications station, and optical communications system
HUAWEI TECH CO LTD0 citations49
US12334984B2Jun 17, 2025
Optical transmitter and optical modulation method
HUAWEI TECH CO LTD0 citations42
US10200771B2Feb 5, 2019
Service switching system and service switching method
HUAWEI TECH CO LTD0 citations39
US10778570B2Sep 15, 2020
Network protection method, network node and system
HUAWEI TECH CO LTD0 citations35
US8380070B2Feb 19, 2013
Upgrading method, system and apparatus of low-density wavelength division multiplexing system
HUAWEI TECH CO LTD0 citations33