Location History:
- Yokohamashi, JP (2000)
- Yokohama, JP (2001 - 2013)
- Fujisawa, JP (2012 - 2013)
Company Filing History:
12 out of 4,714 
7 out of 247 
Years Active: 2000-2013
Title: **Innovator Katsuhiko Yamagata: A Pioneer in Mobile Communication Technologies**
Introduction
Katsuhiko Yamagata, an accomplished inventor based in Yokohama, Japan, has significantly contributed to the field of telecommunications with a total of 19 patents to his name. His innovations are primarily focused on enhancing mobile communication systems, showcasing his expertise and forward-thinking approach in a rapidly evolving technology landscape.
Latest Patents
Yamagata's latest patents include a communication control device and communication control method designed for a subscriber extension line communication system. This revolutionary device aims to eliminate unnecessary processing loads on communication controllers related to mobile telephone destinations, thereby enhancing communication control efficiency. In the context of a Distributed Radio Network Controller (D-RNC) managing mobile communication, his designs enable a seamless transition when a mobile telephone moves into new cells, ensuring uninterrupted connectivity.
Additionally, his method and system for mobile communications improve the authentication process of mobile stations by utilizing a ciphering key corresponding to temporary user mobile identifiers. This innovation not only streamlines call acceptance procedures but also enhances data transmission reliability by implementing advanced encipherment strategies, paving the way for efficient multimedia data exchange.
Career Highlights
Throughout his career, Katsuhiko Yamagata has worked with prominent organizations such as NTT Docomo, Inc. and NTT Mobile Communications Network, Inc. These roles have allowed him to leverage his innovative mindset and work on transformative projects that have shaped the landscape of mobile communications in Japan and beyond.
Collaborations
Yamagata has collaborated with esteemed colleagues, including Takaaki Sato and Mutsumaru Miki. Together, they have pushed the boundaries of mobile technology, facilitating advanced research and development that fosters innovation in the telecommunications sector.
Conclusion
Katsuhiko Yamagata stands out as a key figure in the advancement of mobile communication technologies. With a robust portfolio of patents and collaborations, he continues to influence the telecommunications industry, ensuring the evolution of communication systems meets the needs of a data-driven world. His commitment to innovation and excellence has undeniably left a lasting impact on how we connect and communicate today.