Location History:
- Hiratsuka, JP (2000)
- Kanagawa, JP (1995 - 2006)
- Tokyo, JP (1989 - 2015)
Company Filing History:
13 out of 508 
2 out of 3 
1 out of 1 
Years Active: 1989-2015
Title: Innovator Spotlight: Akio Yamaguchi from Kanagawa, Japan
Introduction: Akio Yamaguchi is a notable inventor hailing from Kanagawa, Japan, with a remarkable portfolio that includes 17 patents. His contributions to technology, particularly in the fields of audio equipment and tape management, showcase his innovative spirit and technical expertise.
Latest Patents: Among his latest patents is the Howling Canceller, which effectively suppresses the occurrence of howling in audio systems, even when the open loop gain exceeds '1' across the entire reproduction band. The design features an adaptive filter that processes the digital received voice signal, generating a pseudo echo. This system utilizes a subtractor to eliminate the pseudo echo from the transmitted voice signal, resulting in a clear residual signal. Additionally, an amplitude limiting circuit ensures that the processed signal remains within the linear operational area of various components, including D/A converters, power amplifiers, and microphones.
Yamaguchi's Tape Pack Appearance Control Apparatus is another significant innovation that enhances the appearance of tape wound on a reel. This apparatus includes a tissue positioned parallel to the inner surface of the reel's flange, which aids in securing the tape edge during winding. This clever design can rotate the tissue in alignment with the tape winding direction or keep it stationary, ensuring a tidy reel-up of the tape.
Career Highlights: Throughout his career, Akio Yamaguchi has been associated with prestigious companies, including Takasago International Corporation and Takasago Koryo Kogyo Kabushiki Kaisha. His work in these organizations has allowed him to cultivate his innovative ideas and translate them into patentable technologies.
Collaborations: Yamaguchi's collaborations with esteemed coworkers, such as Yoji Hori and Toshimitsu Hagiwara, have further fueled his inventive journey. Working alongside talented professionals has likely contributed to the development of groundbreaking technologies that have impacted the industry.
Conclusion: Akio Yamaguchi's innovative contributions to audio technology and tape management demonstrate a commitment to enhancing user experiences through clever designs. His extensive patent portfolio not only highlights his prolific inventive spirit but also underscores the significance of collaboration in fostering technological advancements.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.