Company Filing History:
4 out of 5,895 
1 out of 73 Years Active: 2014-2019
Title: Yi Hai Zhang: Innovator in Telecommunications
Introduction
Yi Hai Zhang is a prominent inventor based in Ottawa, Canada. He has made significant contributions to the field of telecommunications, particularly in improving the reliability of voice and video calls over LTE networks. With a total of 5 patents to his name, Zhang's work has had a substantial impact on mobile communication technologies.
Latest Patents
One of Yi Hai Zhang's latest patents focuses on the reliability of VoLTE/ViLTE calls. This method involves detecting issues with a radio connection on a first Radio Access Technology (RAT) and blocking Non-Access Stratum (NAS) registration on a second RAT during a specified time period. Another notable patent is a method for selecting a cellular network, which includes activating a cellular radio transceiver, scanning frequency lists, and identifying usable channels for optimal connectivity.
Career Highlights
Throughout his career, Yi Hai Zhang has worked with notable organizations such as Blackberry Corporation and the Government of Canada, specifically under the Minister of Natural Resources. His experience in these roles has allowed him to develop innovative solutions that enhance mobile communication systems.
Collaborations
Zhang has collaborated with several professionals in his field, including Jeffrey William Wirtanen and Muhammad Khaledul Islam. These partnerships have contributed to the advancement of his research and the successful development of his patents.
Conclusion
Yi Hai Zhang's contributions to telecommunications demonstrate his commitment to innovation and improvement in mobile communication technologies. His patents reflect a deep understanding of the challenges in the field and a dedication to finding effective solutions.