Company Filing History:
3 out of 7,976 
3 out of 832,880 Years Active: 1996-1998
Title: Innovations of Toshiki Koyama
Introduction
Toshiki Koyama is a notable inventor based in Ueda, Japan. He has made significant contributions to the field of optical recording materials, holding a total of 3 patents. His work focuses on the development of novel phthalocyanine compounds that exhibit improved solubility and high purity.
Latest Patents
Koyama's latest patents include a phthalocyanine compound designed as a layer in optical recording mediums. This innovative compound contains a polymerizable vinyl group within its molecule, enhancing its solubility and purity. The intermediates to this compound also demonstrate similar improvements. Furthermore, when used as a starting monomer, this phthalocyanine compound leads to the creation of a novel polymer. This polymer has a high content of (metal) phthalocyanine and allows for better control over the orientation of phthalocyanine rings. The resulting polymer is anticipated to serve as a functional material in applications such as catalysts and recording materials.
Another patent focuses on a nitro-substituted phthalocyanine compound, which shares similar characteristics of improved solubility and high purity. This compound also contains a polymerizable vinyl group, and its intermediates exhibit enhanced properties. The polymer derived from this compound is expected to have significant utility in various functional applications.
Career Highlights
Throughout his career, Toshiki Koyama has worked with prominent companies, including TDK Corporation. His innovative work has contributed to advancements in optical materials and has positioned him as a key figure in his field.
Collaborations
Koyama has collaborated with notable coworkers such as Mutsumi Kimura and Hirofusa Shirai. Their combined expertise has likely fostered a productive environment for innovation and development.
Conclusion
Toshiki Koyama's contributions to the field of optical recording materials through his innovative phthalocyanine compounds highlight his role as a significant inventor. His work continues to influence advancements in functional materials and their applications.