This inventor holds 1 USPTO granted patent and 1 EPO patent. Top assignees: Daicel Polymer Ltd., Micro Co., Ltd.. Active years: 2012.
Company Filing History:
1 out of 24 
1 out of 18 
Years Active: 2012
Title: Takehiko Shima: Innovator of Direct Liquid-Writing Instruments
Introduction
Takehiko Shima is a notable inventor based in Tokyo, Japan. He is recognized for his innovative contributions to writing instruments, particularly in the development of a direct liquid-writing instrument. His work has led to advancements that enhance the functionality and reliability of writing tools.
Latest Patents
Takehiko Shima holds a patent for a direct liquid-writing instrument designed to prevent ink leakage from the pen-tip, even after prolonged use. This invention features an ink-retaining part shaped like a bellows, composed of a specific blend of materials. The formulation includes 20 to 95% by mass of a polyamide-based resin and 80 to 5% by mass of at least one resin selected from styrene-based, olefin-based, and polyphenylene ether resins.
Career Highlights
Throughout his career, Takehiko Shima has worked with several companies, including Micro Co., Ltd. and Daicel Polymer Ltd. His experience in these organizations has contributed to his expertise in the field of writing instruments and materials science.
Collaborations
Takehiko Shima has collaborated with notable colleagues such as Masahiko Itakura and Hiromoto Sasaki. These partnerships have likely fostered innovation and creativity in his projects.
Conclusion
Takehiko Shima's contributions to the field of writing instruments exemplify the importance of innovation in everyday tools. His patented designs reflect a commitment to enhancing user experience and functionality.