This inventor holds 5 USPTO granted patents. Top assignees: Alcatel Alsthom Compagnie Generale D'electricite, Alcatel, Alcatel Converters. Active years: 1996-2000.
Location History:
- Villebon/Yvette, FR (1996)
- Issy Les Moulineaux, FR (1997)
- Palaiseau, FR (1996 - 2000)
Company Filing History:
2 out of 137 
1 out of 2,504 
1 out of 6 Years Active: 1996-2000
Title: The Innovations of Philippe Poignant
Introduction
Philippe Poignant is a notable inventor based in Palaiseau, France, recognized for his contributions to electrical engineering. With an impressive portfolio of five patents, Poignant has developed technologies that enhance the functionality and efficiency of portable appliances.
Latest Patents
Among Philippe Poignant's latest innovations is an electrical power supply circuit designed specifically for portable appliances. This circuit features an electrochemical cell and a supercapacitor, which acts as a dynamic power source for devices experiencing fluctuating power consumption. The chopper voltage converter included in the design effectively charges the supercapacitor at a constant current while ensuring that the voltage remains within safe limits. This invention is particularly applicable to cellular radiotelephones, improving their reliability and performance.
Another significant patent attributed to Poignant is a method for charging a lithium storage cell equipped with a carbon anode. This patented method incorporates a two-step charging process: the first step involves imposing a constant current that allows the voltage to rise to a designated reference value; the second step involves maintaining this reference voltage while the current is gradually decreased. This innovative approach optimizes the charging process, enhancing the lifespan and efficiency of lithium storage cells.
Career Highlights
Philippe Poignant has gained substantial experience working in prominent companies, including Alcatel Alsthom Compagnie Generale D'Electricite and Alcatel Converters. His roles in these organizations allowed him to delve into cutting-edge technologies, leading to his groundbreaking inventions.
Collaborations
Throughout his career, Poignant has collaborated with various talented professionals in the field. Notable among his coworkers are Xavier Andrieu and Michel Rocher, with whom he has likely shared ideas and expertise to further advance their technological endeavors.
Conclusion
Philippe Poignant's contributions to the field of electrical engineering through his innovative patents showcase his commitment to improving portable appliances and energy storage solutions. His work not only reflects his individual talent but also emphasizes the importance of collaboration in driving technological advancements forward.