4. Optical: systems and elements
  5. Lens
  6. Afocal

David Gordon Norrie

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Afocal telescopes

Optical: systems and elements – Lens – Afocal
Patent

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Face plate graticule

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent

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Three element objective lens system using Germanium lens...

Optical: systems and elements – Having significant infrared or ultraviolet property – Lens – lens system or component
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1293961

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