This inventor holds 2 USPTO granted patents. Top assignees: Eigd Limited, Qinetiq Limited. Active years: 1985-2005.
Company Filing History:
Years Active: 1985-2005
Title: John Graham Crowder: Innovator in Infrared Technology
Introduction
John Graham Crowder is a notable inventor based in Edinburgh, GB. He holds 2 patents that showcase his contributions to the field of infrared technology. His work has significant implications for gas detection and sensor applications.
Latest Patents
One of his latest patents is for an infrared light emitting diode arrangement. This innovative diode emits positive luminescence when forward biased and negative luminescence when reverse biased. The diode is driven by an alternating forward and reverse bias input, stabilizing the difference in output power concerning temperature. This arrangement is particularly useful as a source in gas sensors, reducing or eliminating the need for temperature control in infrared light emitting diode sources.
Another significant patent is for an infrared absorption gas detector. This device utilizes the amount of infrared radiation of a specific wavelength to indicate the presence of a particular gas. The monitoring head of this detector includes a source of infrared radiation, dual infrared detector elements, and an optical path that extends through a gas sample volume. The design allows for a converging beam of radiation concentrated onto both detector elements, operating effectively as a single beam without any moving parts.
Career Highlights
Throughout his career, John has worked with several companies, including Qinetiq Limited and EIGD Limited. His experience in these organizations has contributed to his expertise in developing advanced infrared technologies.
Collaborations
John has collaborated with notable individuals in his field, including Timothy Ashley and Volker P Manheim. These partnerships have likely enhanced his innovative capabilities and broadened the impact of his work.
Conclusion
John Graham Crowder is a distinguished inventor whose work in infrared technology has led to significant advancements in gas detection and sensor applications. His patents reflect a commitment to innovation and practical solutions in the field.