This inventor holds 2 USPTO granted patents. Top assignees: Hitachi, Ltd., Hitachi Chemical Company, Ltd.. Active years: 1984-1990.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
2 out of 42,740 
1 out of 1,641 Years Active: 1984-1990
Title: Naohisa Watahiki: Innovator in Energy Solutions
Introduction
Naohisa Watahiki is a notable inventor based in Mito, Japan. He has made significant contributions to the field of energy solutions, particularly through his innovative patents. With a total of 2 patents, Watahiki's work focuses on enhancing energy storage and solar heat collection technologies.
Latest Patents
Watahiki's latest patents include a sodium-sulphur cell and a solar heat collector. The sodium-sulphur cell features liquid sodium as the anodic reactant, with sulphur and sodium polysulphide serving as cathodic reactants. This design incorporates a solid electrolyte that conducts sodium ions, while also providing a storage region for cathodic reactants away from the solid electrolyte. This innovative approach aims to increase cell capacity and improve safety by utilizing two contacting layers of immiscible liquids formed through gravitational separation. The solar heat collector consists of an evacuated transparent pipe, a solar heat collection plate, and a heat pipe containing an evaporable working liquid. This system effectively captures solar heat and transfers it to a heat medium, showcasing Watahiki's commitment to advancing renewable energy technologies.
Career Highlights
Throughout his career, Naohisa Watahiki has worked with prominent companies such as Hitachi, Ltd. and Hitachi Chemical Company, Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to the advancement of energy solutions.
Collaborations
Watahiki has collaborated with notable coworkers, including Hiromi Tokoi and Hisashi Souma. These partnerships have fostered a creative environment that encourages the development of groundbreaking technologies.
Conclusion
Naohisa Watahiki's contributions to energy solutions through his patents reflect his innovative spirit and dedication to advancing technology. His work in sodium-sulphur cells and solar heat collectors positions him as a key figure in the field of renewable energy.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile