...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 6371613 | Lens frame for spectacles A lens frame for spectacles, wherein an elastic segment is disposed between a pair of assembling pieces which are formed at both free ends of the lens frame, with the free ends defining an assembling region. When lenses are fitted into the lens frame, the... | 04/16/2002 |
| 5523806 | Eyeglasses having improved lens fastening member To avoid excessive stressing of lenses and still facilitate the attaching and removing of the lens to the rim, a pair of eyeglasses has an improved rim lock member. The rim lock member has a two-parallel wire arrangement and a metal piece slidably movable... | 06/04/1996 |
| 5450141 | Lens coupling structure for rimless eyeglasses A lens coupling structure couples a bridge or a temple to a lens of rimless eyeglasses. A bridge or a temple is coupled through a flanged bush to the lens which is formed with a screw hole and a recess. The coupling portion of the bridge or temple and the... | 09/12/1995 |
| 5400089 | Eyeglass frame with improved securement of lenses therein An eyeglass frame has rims or surrounds at least locally made from a relatively rigid material. They have in transverse cross-section over at least part of their length a U-shape profile with a median part and side flanges. A strip of relatively flexible ... | 03/21/1995 |
| 5325132 | Eyewire locking device This disclosure refers to the securing of lenses in an ophthalmic mounting having a split rim eyewire using a spring loaded connecting device.... | 06/28/1994 |
| 5293185 | Eyeglass frame permitting interchanging of lenses An eyeglass frame having removable lenses, comprising of lens rings which are split into an upper and lower ring portion. Interposed between the upper and lower ring portions, and forming an integral part of the frame and positive actuating means to force... | 03/08/1994 |
| 4971431 | Device for the temporary fixing of lenses on a spectacle frame The invention relates to a device for fixing lenses in the bezel rims of a spectacle frame, allowing easy and repeated mounting and removal of these lenses on to and from the frame. The bezel of the frame rim has a concave polyganol shape in cross-section... | 11/20/1990 |
| 4834523 | Eyeglasses with separable rims Eyeglasses of a type which permit interchanging of lenses are disclosed which employ a collapsible frame having a pair of hingedly interconnected lens-mounting portions. The lens-mounting portions are configured to engage the peripheral edge of the lens a... | 05/30/1989 |