British merchant Peter Durand invented the tin can in 1810.
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| Number | Title | Issue Date |
| 8136946 | Apparatus for determining prescription for prism lenses for diplopic patients An apparatus is provided for finding and defining a prescription for prism glasses for Diplopic patients and AMD patients whose Macula and Fovea are damaged enough that the patients have double vision, but, still have relatively good acuity. The apparatus positions ... | 03/20/2012 |
| 8123355 | Apparatus for determining prescription for reading lenses for eyes with mild AMD An apparatus is provided for finding and defining a prescription for reading glasses for an AMD patient whose Macula and Fovea are damaged enough that the patient has double vision, i.e. the patient sees two images of every object within the field of view of the Mac... | 02/28/2012 |
| 7438416 | Optometric apparatus An optometric apparatus for examining refractive power of an examinee's eye subjectively, capable of performing highly-precise examination. The apparatus has a test window through which a presented optotype is seen, a first spherical-power applying unit which applie... | 10/21/2008 |
| 7159984 | Subjective optometric apparatus Disclosed is a subjective optometric apparatus in which the earpiece members and the nose pad member for attaching the main body of the device to the subject can be easily adjusted without involving any effort. The subjective optometric apparatus has a horizontal fr... | 01/09/2007 |
| 5742375 | Head mounted lens support A head mounted lens support for performing examination and photography of the posterior structures of the eye. The support includes a lateral support to which a pair of adjustable earpieces, and an adjustable nosebridge are attached. Right and left lens p... | 04/21/1998 |
| 5281984 | Illumination apparatus for ophthalmic refractors An illuminator assembly is provided for ophthalmic refractors which is formed as a singular light guide formed in unitary fashion of a transparent polymeric material. The light guide includes a light input portion located adjacent an incandescent light so... | 01/25/1994 |
| 5104214 | Trial frames, adjustable spectacles and associated lens systems Trial frames including two independently rotatable cells alignable with each eye are disclosed. Each set of cells is designed to house a pair of either cylinder, polarized, prism, crossed cylinder or sphero-cylinder lenses as appropriate for correcting op... | 04/14/1992 |
| 4703964 | Tinted contact lens fitter Tinted contact lens fitter having a scissors type support to vary the spacing between pairs of tinted contact lenses mounted in rotatable discs, or in plug-in lens holders, or directly in openings in the support, so that the centers of the tinted contact ... | 11/03/1987 |
| 4500180 | Motorized refraction apparatus An improved refractor for use in the subjective examination of human eyes. Each half of the refractor includes a plurality of lens supporting disks, a hub assembly for rotatably supporting the disks, and a comb assembly to space the disks along the optica... | 02/19/1985 |
| 4236793 | Ophthalmic refracting device A fixture for use in refracting an aphakic eye over a properly patient fitted spectacles frame glazed with major spherical component lenses and placed in a position of use upon the patient. The fixture, having trial lens holders for right and left eye ref... | 12/02/1980 |