Location History:
- Kangawa-ken, JP (2010)
- Tokyo, JP (2014)
- Yokohama Kanagawa, JP (2019)
- Yokohama, JP (1988 - 2024)
- Kanagawa, JP (2024)
Company Filing History:
27 out of 265 
24 out of 52,711 
5 out of 599 
Years Active: 1988-2025
Title: Innovations by Masahiko Yamakawa: A Pioneer in White Light Technology
Introduction: Masahiko Yamakawa, located in Yokohama, Japan, is a prolific inventor with an impressive portfolio of 33 patents. His work primarily focuses on the utilization of white light sources to manipulate daily rhythms and enhance lighting experiences.
Latest Patents: Yamakawa’s latest patents showcase his dedication to advancing lighting technology. One of his notable inventions, titled "Method for Using White Light Source," describes a white light source designed to control daily rhythm and create pleasant lighting environments. The technology involves the interaction of the light emitted with intrinsically photosensitive retinal ganglion cells (ipRGCs) and visual cells of the L cone and M cone, defining various irradiance ratios. Another significant patent, "Light Source for Myopia Prevention Article," details a light emitter that emits light over a specific spectrum range, aiming to prevent myopia in users.
Career Highlights: Throughout his career, Yamakawa has demonstrated a commitment to innovation while working with respected companies such as Toshiba Materials Co., Ltd. and Kabushiki Kaisha Toshiba. His inventions have contributed greatly to enhancing the understanding and application of light technology in everyday life.
Collaborations: Yamakawa has collaborated with notable colleagues, including Yasuhiro Shirakawa and Noriaki Yagi. Together, they have pushed the boundaries of lighting technology, resulting in innovative solutions to modern challenges related to vision and light exposure.
Conclusion: Masahiko Yamakawa stands out as a significant figure in the field of lighting innovation. His continuous contributions through multiple patents not only enhance our understanding of light's influence on health but also pave the way for practical applications in various industries. His work holds promise for future advancements in lighting technology, with potential benefits for daily life and well-being.
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.