4. Photography
  5. Having lens converter or extension tube

James A. Frazier

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Afocal Galilean attachment lens with high pupil magnification

Optical: systems and elements – Lens – Selective magnification by exchanging or adding a lens...
Reexamination Certificate

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Close/intra-formation positioning collision avoidance system...

Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Reexamination Certificate

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Wide angle, deep field, close focusing optical system

Photography – Having lens converter or extension tube
Patent

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Profile ID: LFUS-PAI-P-294168

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