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

Joseph R. Bietry

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Afocal attachment for projection lens

Optics: image projectors – Lens support – Lens position adjustable
Reexamination Certificate

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Compact folded thin lens

Optical: systems and elements – Prism – With reflecting surface
Reexamination Certificate

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Dual aperture lens

Optical: systems and elements – Lens – With light limiting or controlling means
Patent

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Dual focal length lens system

Optical: systems and elements – Lens – With reflecting element
Reexamination Certificate

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High efficiency digital cinema projection system with...

Optics: image projectors – Polarizer or interference filter
Reexamination Certificate

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Profile ID: LFUS-PAI-P-379617

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