Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Health & Medicine
Class Information
Number: 351/161
Name: Optics: eye examining, vision testing and correcting > Spectacles and eyeglasses > Ophthalmic lenses or blanks > Eye contact type > Multifocal
Description: Subject matter wherein the contact lens comprises two zones of different focal length, one zone to correct the distance vision and another zone to correct the reading vision.










Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
4418991 Presbyopic contact lens Dec. 6, 1983
4416814 Protein polymer hydrogels Nov. 22, 1983
4349470 Protein polymer hydrogels Sep. 14, 1982
4340283 Phase shift multifocal zone plate Jul. 20, 1982
4338005 Multifocal phase place Jul. 6, 1982
4324461 Contact lens for non-rotational orientation Apr. 13, 1982
4302081 Fused bifocal contact lens Nov. 24, 1981
4268133 Preferential orientation of contact lenses May. 19, 1981
4264493 Natural protein polymer hydrogels Apr. 28, 1981
4239712 Method of making bifocal contact lenses Dec. 16, 1980
4210391 Multifocal zone plate Jul. 1, 1980
4202848 Method of making bifocal contact lenses May. 13, 1980
4199231 Hydrogel contact lens Apr. 22, 1980
4174156 Optical lens for differential correction Nov. 13, 1979
4162122 Zonal bifocal contact lens Jul. 24, 1979
4095878 Soft contact lens with flattened region for automatic orientation Jun. 20, 1978
4010496 Bifocal lens which positions within the anterior chamber Mar. 8, 1977
3973837 Contact lenses Aug. 10, 1976
3973838 Contact lenses Aug. 10, 1976
3962505 Plastic contact lens with magnetic embedded metal ring Jun. 8, 1976
3950082 Ophthalmic lens for presbyopia and aphakia Apr. 13, 1976

1 2 3 4 5 6 7 8 9










 
 
  Recently Added Patents
Adaptive input interface
Administrable compositions
Electrowetting display devices with a reflective plate structure
Method for parking or exiting a parking bay and for avoiding a collision of a vehicle, and corresponding assistance systems and vehicle
Method for production of a thermoelectric apparatus
Methods, systems, and physical computer storage media for processing a plurality of input/output request jobs
Method for etched cavity devices
  Randomly Featured Patents
Vehicle door panel
Automobile body
Image input apparatus for resetting the amount of exposure from a correction value for a predetermined standard value
Combined poker fob and zipper pull
System and method for facilitating communication between two parties
Ballistic resistant materials and method of manufacture
Vehicle-wheel front face
Method of sealing a container and removing air headspace
Tire pressure drop alarming apparatus
Milk foamer