Sensing a narrow frequency band of radiation and gemstones

Assignee

• Gersan Establishment

Inventors

• Andrew D. G. Stewart (12 patents)
• Robin W. Smith (8 patents)
• Martin P. Smith (21 patents)
• Daniel J. Brink (2 patents)
• Martin Cooper (27 patents)
• Christopher M. Welbourn (12 patents)
• Paul Martyn Spear (7 patents)

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