4. Optics: eye examining, vision testing and correcting
  5. Spectacles and eyeglasses
  6. Temples

Otto Lehnert

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Locking screw

Dentistry – Prosthodontics – Holding or positioning denture in mouth
Patent

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Method of manufacturing spring hinges

Metal working – Hinge making or assembling
Patent

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Spring hinge

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Hinge – Eyeglass hinge
Patent

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Spring hinge for eyewear

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Temples
Patent

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Spring hinges

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Hinge – Eyeglass hinge
Patent

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Profile ID: LFUS-PAI-P-314015

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