Location History:
- Takarazuka, JP (1978 - 1980)
- Hirakata, JP (1981 - 1993)
- Toyonaka, JP (1994 - 2001)
- Osaka, JP (1996 - 2023)
- Sakai, JP (1992 - 2024)
Company Filing History:
17 out of 2,697 
13 out of 6,896 
3 out of 257 
Years Active: 1978-2025
Title: **Innovative Contributions of Tetsuo Yamaguchi**
Introduction
Tetsuo Yamaguchi, an accomplished inventor based in Osaka, Japan, has made significant strides in the field of engineering through his 33 patents. His work primarily revolves around advanced machinery and powertrain technologies, showcasing his expertise and commitment to innovation.
Latest Patents
Among his recent inventions, Yamaguchi has developed an electromagnetic valve control device and a continuously variable powertrain device for work vehicles. The electromagnetic valve control device is engineered to enhance the functionality of work vehicles by employing a current gear ratio obtainer and a current electric current value obtainer to effectively manage the operations of electromagnetic valves. This innovation allows for precise control over the pump swash plate, optimizing performance.
The continuously variable powertrain device seamlessly integrates a hydraulic static transmission and a planetary transmission, delivering continuously adjusted motive power based on real-time input from an engine. This sophisticated design includes mechanisms for hydraulic pressure detection and planetary clutch operation, positioning it as a crucial advancement in work vehicle technology.
Career Highlights
Tetsuo Yamaguchi has made notable contributions while working at established companies such as Kubota Corporation and Sumitomo Chemical Company, Limited. His tenure at these organizations has enabled him to leverage extensive resources and collaborate with some of the brightest minds in the industry, further solidifying his status as an innovator.
Collaborations
Throughout his career, Yamaguchi has worked alongside talented colleagues, including Ryoma Iwase and Hitoshi Azuma. These collaborations have fostered a creative environment that has been instrumental in driving forward innovative engineering solutions.
Conclusion
Tetsuo Yamaguchi's innovative work in the realm of engineering, especially in the development of powertrain devices and control systems for work vehicles, underscores his commitment to enhancing machinery functionality. With 33 patents to his name, Yamaguchi’s contributions continue to shape the future of technology in the industry, inspiring both current and future inventors.