Location History:
- Tokyo, JP (2009)
- Kanagawa, JP (2011)
Company Filing History:
2 out of 8 
1 out of 39 
Years Active: 2009-2011
Title: Kunitetsu Makino: Innovator in Optical Switching Technology
Introduction
Kunitetsu Makino is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of optical switching technology, holding a total of 3 patents. His work focuses on enhancing optical access networks and improving the efficiency of optical switching devices.
Latest Patents
Makino's latest patents include an optical switching device, an optical access network, and an optical switching method. One of his notable inventions involves an optical access network that eliminates the need for a 2×1 optical splitter in both uplink and downlink directions. This innovation extends the transmission distance between the Optical Line Terminal (OLT) and the Optical Network Unit (ONU). His optical switching device features a downlink optical switch element for managing downlink signals from the OLT and an uplink optical switch element for handling signals from multiple ONUs. Additionally, it incorporates optical/electrical (O/E) converters and electrical/optical (E/O) converters to facilitate seamless signal conversion.
Another significant patent focuses on synchronizing methods within optical access networks. This invention provides optical switch modules, center devices, and remote devices that can determine the connection start time of upstream optical switching elements. The center device transmits the difference in roundtrip times between the remote device and the optical switch module, enabling precise synchronization.
Career Highlights
Throughout his career, Kunitetsu Makino has worked with notable companies such as NEC Communications Systems, Ltd. and NEC Communication Systems, Ltd. His experience in these organizations has allowed him to develop and refine his expertise in optical technologies.
Collaborations
Makino has collaborated with talented individuals in the field, including Takumi Nomura and Hiromi Ueda. These partnerships have contributed to the advancement of optical switching technologies and have fostered innovation in the industry.
Conclusion
Kunitetsu Makino's contributions to optical switching technology have made a significant impact on the field. His innovative patents and collaborations highlight his dedication to advancing optical access networks. His work continues to influence the development of efficient communication systems.