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Class Information
Number:
351/231
Name:
Optics: eye examining, vision testing and correcting
>
Eye examining or testing instrument
>
Subjective type
>
Including trial frame
> Removably attachable to eye glass frame
Description:
Subject matter where the frame structure is removably attachable to an eyeglass frame.
Patents under this class:
Patent Number
Title Of Patent
Date Issued
7540612
Device and method for determining the height of the middle of the pupil in relation to the lowest part of a pair of eyeglasses
Jun. 2, 2009
6808264
Pupil center determination recorder
Oct. 26, 2004
5488439
Lens holder system for eyeglass frame selection
Jan. 30, 1996
4988185
High add bifocal spectacles and methods of prescribing
Jan. 29, 1991
4561739
Trial spectacles
Dec. 31, 1985
4236793
Ophthalmic refracting device
Dec. 2, 1980
4220402
Trial lens eyeglass clip
Sep. 2, 1980
4029402
Optical aid for use in the selection of spectacle frames
Jun. 14, 1977
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