Location History:
- Kobe, JP (2001 - 2004)
- Tokyo, JP (2002 - 2022)
Company Filing History:
6 out of 253 
3 out of 193 
3 out of 942 Years Active: 2001-2024
Title: The Innovations of Akihisa Yamashita
Introduction
Akihisa Yamashita, an accomplished inventor based in Tokyo, Japan, has made significant contributions to the field of polymer technology. With an impressive portfolio of 13 patents, he has focused his research and development efforts on creating advanced materials, particularly in the realm of polyolefin membranes.
Latest Patents
Among his latest patents, Yamashita has developed a polyolefin microporous membrane characterized by a specific loss tangent (tan δ) at 230° C. This innovative membrane has a range of 0.35 or more and less than 0.60 when subjected to melt viscoelasticity measurement. Another notable invention is a polyolefin microporous film designed for use in lithium-ion secondary cells. The film features a laminated structure with at least one layer containing polyolefin and a second layer that comprises different proportions of polypropylene. This innovation addresses the critical parameters related to heat shrinkage in the manufacturing process, enhancing the performance of lithium-ion batteries.
Career Highlights
Yamashita has built a reputable career through his work at notable companies such as Konami Co., Ltd. and Konami Corporation. His experience in these organizations has allowed him to apply his inventive skills and contribute meaningfully to advancements in polymer technology and energy storage solutions.
Collaborations
His work would not be possible without collaboration with talented individuals such as Hideki Kotani and Kojiro Minami. Together, they have explored innovative solutions and pushed the boundaries of what is possible in the field of materials science.
Conclusion
Akihisa Yamashita stands out as a pioneering inventor in Japan, particularly in the area of polyolefin membranes and films. His 13 patents reflect his relentless pursuit of innovation and improvement in material technologies, potentially revolutionizing industries that rely on advanced polymer applications. As his career progresses, further breakthroughs can be anticipated from this dedicated inventor.
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.