This inventor holds 2 USPTO granted patents. Top assignees: Erma Optical Works, Ltd., Showa Denko K.k., Showa Denko Kabushiki Kaisha. Active years: 1978-1981.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
1 out of 5 
1 out of 1,961 
1 out of 405 Years Active: 1978-1981
Title: Tsuyoshi Yamada: Innovator in Analytical Techniques
Introduction
Tsuyoshi Yamada is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of analytical chemistry, particularly through his innovative patents. With a total of 2 patents, Yamada has developed methods that enhance the analysis of acidic substances and improve measurement techniques.
Latest Patents
One of Yamada's latest patents is a method for analyzing acidic substances by high-speed liquid chromatography. This process incorporates an aqueous pH indicator solution in the effluent from a column packed with a specific packing material. The pH indicator-incorporated effluent is monitored using spectrophotometry. The sulphon phthalein indicator used in this method is slightly soluble in water and has a pH transformation range from about 3.0 to about 10.0. This innovative approach allows for precise monitoring of acidic substances, enhancing the efficiency of chemical analysis.
Another significant patent by Yamada is a high-sensitivity differential refractometer. This device features a light source positioned outside the housing and a reflecting mirror that can change angles freely. The design allows for improved measurement accuracy, making it a valuable tool in various analytical applications.
Career Highlights
Throughout his career, Tsuyoshi Yamada has worked with prominent companies such as Showa Denko and Erma Optical Works, Ltd. His experience in these organizations has contributed to his expertise in developing advanced analytical instruments and methods.
Collaborations
Yamada has collaborated with notable individuals in his field, including Sadao Sumikama and Kazuo Hiraizumi. These partnerships have fostered innovation and the exchange of ideas, further enhancing the impact of his work.
Conclusion
Tsuyoshi Yamada's contributions to analytical chemistry through his patents demonstrate his commitment to innovation and excellence. His work continues to influence the field, providing valuable tools for researchers and professionals alike.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile