This inventor holds 3 USPTO granted patents. Top assignees: Showa Denko Kabushiki Kaisha, Erma Optical Works, Ltd., Showa Denko K.k.. Active years: 1976-1978.
Location History:
- Tokyo, JA (1976)
- Yokohama, J (1976)
- Yokohama, JP (1978)
Company Filing History:
2 out of 405 
1 out of 5 
1 out of 1,961 
Years Active: 1976-1978
Title: Sadao Sumikama: Innovator in Refractometry and Chromatography
Introduction
Sadao Sumikama is a notable inventor based in Yokohama, Japan. He has made significant contributions to the fields of refractometry and chromatography, holding a total of 3 patents. His innovative designs have advanced the capabilities of scientific instruments, enhancing their sensitivity and reliability.
Latest Patents
One of Sumikama's latest patents is a high-sensitivity differential refractometer. This device features a light source positioned outside its housing, along with a reflecting mirror that is attached to a movable plate. The movable plate can rotate around a vertical axis, allowing for adjustable angles between the reflecting mirror-supporting plate and the movable plate. Additionally, it includes a twisting member within a lead-in tube, which is secured to a removable case built into a metallic block inside the housing. Another significant patent is an improved apparatus for protecting a liquid chromatography column. This invention addresses environmental changes in pressure and temperature, ensuring that the liquid and gas within a non-expandable container do not adversely affect the chromatography column. The design prevents gas from entering the column by incorporating a conduit that connects the column to the container, which extends into the interior of the container.
Career Highlights
Throughout his career, Sadao Sumikama has worked with prominent companies, including Showa Denko K.K. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects.
Collaborations
Sumikama has collaborated with esteemed colleagues such as Susumu Ishiguro and Kazuo Hiraizumi. Their joint efforts have furthered advancements in their respective fields.
Conclusion
Sadao Sumikama's contributions to refractometry and chromatography demonstrate his innovative spirit and dedication to scientific advancement. His patents reflect a commitment to improving the functionality and efficiency of scientific instruments.