Location History:
- Itami, JP (1993)
- Tokyo, JP (1998)
- Hyogo, JP (2009 - 2013)
- Amagasaki, JP (2012 - 2013)
Company Filing History:
7 out of 218 
1 out of 1,326 
1 out of 42 Years Active: 1993-2013
Title: The Innovations of Masayoshi Hachiwaka
Introduction
Masayoshi Hachiwaka is a notable inventor based in Hyogo, Japan. He has made significant contributions to the field of optical fiber technology, holding a total of seven patents. His work has advanced the understanding and application of optical fibers in various industries.
Latest Patents
Hachiwaka's latest patents include an innovative optical fiber and a method for fabricating the same. This optical fiber features a core surrounded by a first cladding with a lower refractive index. Additionally, a second cladding surrounds the first cladding, also with a lower refractive index. The first cladding is doped with a light attenuating dopant, which increases in concentration from the inner surface to the outer surface. Another significant patent is for a graded index multimode optical fiber, which includes a core with an outside diameter of 45-65 micrometers. This fiber also features multiple claddings with varying refractive indices, enhancing its performance.
Career Highlights
Throughout his career, Hachiwaka has worked with prominent companies such as Mitsubishi Cable Industries, Ltd. and Mitsubishi Jukogyo Kabushiki Kaisha. His experience in these organizations has allowed him to develop and refine his expertise in optical fiber technology.
Collaborations
Hachiwaka has collaborated with esteemed colleagues, including Haruo Oo