This inventor holds 13 USPTO granted patents and 2 EPO patents. Top assignees: Nec Corporation, Nec C Orporation, Sumitomo Osaka Cement Co., Ltd.. Active years: 1999-2025.
Company Filing History:
12 out of 36,653 
1 out of 196 
1 out of 482 Years Active: 1999-2025
Title: The Innovations of Tadashi Koga
Introduction
Tadashi Koga is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of communication technology, holding a total of 13 patents. His work focuses on optimizing communication systems and methods, showcasing his expertise in the area.
Latest Patents
Koga's latest patents include a communication apparatus, communication system, communication method, and a non-transitory computer readable medium. These innovations aim to reduce differences among receiving characteristics of multiple quadrature amplitude-modulated signals while optimizing the capacity of transmission signals. The communication apparatus features a transmitting unit capable of transmitting various types of quadrature amplitude-modulated signals, along with an addition unit that incorporates error correction codes. Additionally, the control unit adjusts the number of bits of the error correction code based on the type of quadrature amplitude-modulated signal. Another notable patent involves an optical receiver and receiving method, which includes components such as a local oscillation light output unit, phase adjustment unit, and polarization control unit. This invention enhances the reception of optical signals by adjusting the phase and controlling polarization rotation.
Career Highlights
Throughout his career, Koga has worked with notable companies, including NEC Corporation and Sumitomo Osaka Cement Co., Ltd. His experience in these organizations has contributed to his development as an inventor and innovator in the communication technology sector.
Collaborations
Koga has collaborated with esteemed colleagues, including Yasuhiro Aoki and Morihiko Ota. These partnerships have likely fostered a creative environment that has led to the development of groundbreaking technologies.
Conclusion
Tadashi Koga's contributions to communication technology through his patents and collaborations highlight his role as a significant inventor in the field. His innovative approaches continue to influence advancements in communication systems.