Henri Grateau

Title: Henri Grateau: Inventor of Measurement Technologies

Introduction

Henri Grateau is an inventor based in Le Gua, France. His work includes inventions for measuring blood-gas levels through the skin and for optically measuring materials. He is associated with Commissariat à l’énergie atomique et aux énergies alternatives and holds 2 patents.

Latest Patents

Grateau’s listed patents address two different measurement challenges.

“Portable device for estimating the partial pressure of blood gas” describes a device designed to rest against human or animal skin and estimate the body’s content of a gas of interest. An aperture collects gas emitted through the skin, and a sensor measures its concentration in a measuring chamber. The device also includes a heat source to raise the contact face above 37°C and an air intake that admits ambient air.

“Device for optical measurement of materials, using multiplexing of light” describes a system that illuminates a material and guides some of the resulting light for measurement. An annular light scatterer directs a proportion of the light into a guide, where it travels perpendicular to the illumination axis. The design specifies a guide zone whose area is at least as large as the cross-section of the light beam incident on the material.

Career Highlights

The two inventions reflect Grateau’s work on measurement devices that combine sensing components with carefully designed pathways for gas or light. One focuses on estimating blood-gas levels noninvasively, while the other uses light guidance to support material analysis.

Collaborations

Grateau is associated with Commissariat à l’énergie atomique et aux énergies alternatives. His listed coworkers include Sadok Gharbi and Marc Accensi.

Conclusion

Henri Grateau’s patent portfolio highlights practical approaches to biomedical and optical measurement, spanning skin-based gas estimation and light-guided material analysis.