Company Filing History:
2 out of 4 
1 out of 2 
1 out of 832,761 Years Active: 2004-2006
Title: Inventor Takeshi Yamamoto: Pioneering Innovations in Polarizing Plates
Introduction
Takeshi Yamamoto, an accomplished inventor based in Moriyama, Japan, has significantly contributed to the field of optics through his innovative designs in polarizing plates. With a total of three patents to his name, Yamamoto's work addresses critical challenges faced in high humidity and high-temperature environments, ensuring enhanced performance and reliability of optical devices.
Latest Patents
Yamamoto's latest patents focus on advanced polarizing plates that minimize polarization efficiency drops, hue shifts, and light leakage. His first invention details a polarizing plate that includes a polyvinyl-alcohol-based polarizing film accompanied by a protective film made predominantly of cyclic-olefin-based resin. This design also incorporates an anchor coat agent film and an adhesive layer to optimize performance. The innovative structure ensures that the amount of change in optical in-plane retardation remains 5 nm or less after 24 hours at 80°C, and the wetting tension of the laminated surface exceeds 500 μN/cm at 23°C.
In the second patent, Yamamoto presents another advanced polarizing plate that similarly combats issues related to temperature and humidity. This design features two anchor coat agent layers made of polyisocyanate and polyester polyol, as well as polyvinyl alcohol, reinforcing the adhesive capabilities and stability of the protective film. The persistence of performance under harsh conditions highlights Yamamoto's commitment to innovation in optical technology.
Career Highlights
Throughout his career, Takeshi Yamamoto has made significant strides in the field of optics, particularly while working at Gunze Co., Ltd. His experience in this prominent company has honed his expertise in designing materials that address complex environmental challenges. As an inventor, his persistent pursuit of improvement in polarizing technologies showcases the essence of innovation and practicality.
Collaborations
In his professional journey, Yamamoto has collaborated with esteemed colleagues such as Yoshinori Ishii and Takao Uesugi. Their collective knowledge and experience contribute to advancing research and development in polarizing technologies, facilitating breakthroughs in optical solutions.
Conclusion
Takeshi Yamamoto stands out as an influential figure in the realm of optical inventions, particularly with his focus on polarizing plates. His technical innovations demonstrate a thorough understanding of the materials and environmental conditions that impact performance. Through his patents, Yamamoto continues to push the boundaries of what is possible in optics, reaffirming his status as a leading inventor in this specialized field.