Location History:
- Kanagawa, JP (2001 - 2004)
- Yokohama, JP (1995 - 2015)
Company Filing History:
2 out of 84 
2 out of 188 
1 out of 331 Years Active: 1995-2015
Title: Innovations of Yoshihiro Kumagai: A Pioneer in Liquid Crystal Technology
Introduction
Yoshihiro Kumagai, an inventive mind based in Yokohama, Japan, has made significant contributions to the field of liquid crystal technology. With a total of 7 patents to his name, Kumagai focuses on methods and elements that enhance the functionality of organic electroluminescent (EL) devices and liquid crystal displays (LCDs). His innovative approaches are paving the way for advancements in display technology.
Latest Patents
Kumagai's latest patents illustrate his expertise in producing advanced substrate materials and liquid crystal devices. One notable invention is a “Method for producing concave-convex substrate using sol-gel method, sol used in same, method for producing organic EL element using same, and organic EL element obtained thereby.” This method involves applying a sol containing a silica precursor to a substrate to create a coating film, followed by a precise process of drying, pressing, and baking to achieve patterns of concavity and convexity.
In addition, he has developed a “Liquid crystal cell with twist angle from 180 to 270 degrees and twisted optical compensating element.” This invention enhances the performance of liquid crystal display devices by adjusting the twist angles and incorporating a compensating element with specific optical properties to improve display characteristics.
Career Highlights
Kumagai's career includes notable positions at prestigious companies such as Nippon Mitsubishi Oil Corporation and Nippon Oil Corporation. His work at these firms has honed his innovative capabilities and facilitated his contributions to the advancements in liquid crystal and organic EL technologies.
Collaborations
Throughout his career, Kumagai has collaborated with talented individuals including Takehiro Toyooka and Kenji Hosaki. These partnerships have fostered a creative environment, resulting in influential inventions and enhancements in technology.
Conclusion
Through his determination and innovative spirit, Yoshihiro Kumagai continues to impact the world of display and electronic device technologies. His array of patents reflects his commitment to improving the functionalities of liquid crystal displays and organic EL elements, marking him as a key inventor in his field. With ongoing advancements and collaborations with fellow inventors, he is poised to further revolutionize technology in the years to come.
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.