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

Lothar Koelsch

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Compact photographic objective of the triplet type having improv

Optical: systems and elements – Lens – Multiple component lenses
Patent

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Switchable flap valve

Fluid handling – Destructible or deformable element controlled – Destructible element
Reexamination Certificate

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Telephoto camera lens

Optical: systems and elements – Lens – Telephoto
Patent

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Profile ID: LFUS-PAI-P-1246100

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