What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.
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363-131 121-55A 14-.5
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Class Number: 351 Class Title: OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING Subclass Subclass Number Title 200 EYE EXAMINING OR TESTING INSTRUMENT 201 .For fusion and space perception testing (e.g., stereoscopic vision) 202 ..Of abnormal muscular functioning 203 .Eye exercising or training type 204 .For interpupillary distance measuring or lens positioning 205 .Objective type 206 ..Including eye photography 207 ...Having spurious reflection blocking 208 ...Having means to detect proper distance or alignment (i.e., eye to instrument) 209 ..Including eye movement detection 210 ...Using photodetector 211 ..Including projected target image 212 ...For cornea curvature measurement 213 ..Including light filter or absorber 214 ..Including diaphram or slit 215 ..Including light polarizing means 216 ..Including lens selectively insertable in optical path 217 ...On rotary disc 218 ....Hand held type 219 ..With contact lens 220 ..Including reflectors with off-set surfaces 221 ..Including illuminator 222 .Subjective type 223 ..Self examining type 224 ..Perimeter type 225 ...With rotatable arm 226 ...With bowl type screen 227 ..Including trial frame 228 ...With multifocal lens 229 ...With plural lens carrier 230 ...With individual lens holder 231 ...Removably attachable to eye glass frame 232 ..With light polarzing lens 233 ..Lens or filter selectively insertable in optical path 234 ...Mounted on rotatable disc 235 ....Having plural disc carrier 236 ...Movable along optical axis 237 ..Including target image projection 238 ...Tachistoscope type 239 ..Including test chart or target 240 ...Stereoscopic type 241 ...Astigmatism type 242 ...Chromaticity type 243 ...Illuminated 244 ...Having support or cabinet 245 .Support 246 .Methods of use 247 ..For contact lens fitting 41 SPECTACLES AND EYEGLASSES 42 .Lens repair devicess 43 .Floating or underwater type 44 .With antiglare or shading 45 ..Partially occluding the light-path area 46 ..Perforated opaque plates or shields 47 ..Removable and/or adjustable filters or screens (e.g., clip-on type) 48 ...Spring biased 49 ..Polarizing 50 .With rear-view reflectors 51 .With decoration or ornamentation 52 ..Detachably secured 53 .Shooting type 54 .Invertible or reversible multifocal type 55 .With vertical adjustment of multifocal lenses 56 .Lorgnette type 57 .With auxiliary lenses movable in and out of the optical path (e.g., clip-on type attachments) 58 ..Spring biased or secured by friction members 59 .Lens pivots in and out of optical path 60 .With lens suspension bar (e.g., torsion bar) 61 .U-shape or half-moon lens below eye level 62 .With moisture prevention or absorption 63 .Folding 64 ..Pince-nez type 65 .Pince-nez type (including pince-nez bridges, nose grips and nose pads therefor) 66 ..With ear chain or temple 67 ..Plural bridges 68 ..With resilient extensible bridge 69 ..Lens and nose grip movable on flexible bridge 70 ..Posts or studs connecting bridge and nose grip 71 ..With spring biased nose grips 72 ...With pivoting levers 73 ....With flat spiral springs 74 ....With springs below bridge 75 ....With springs encased 76 ..With adjustable or rockable nose grips or pads 77 ...With ball joints 78 ..Nose pads or cushions 79 ...Plural pad parts engage the nose 80 ...Detachable 81 ...Perforated or serrated 82 ...Fluid-filled or suction type 83 .Continuous rim mounting 84 ..With rotating means for multifocal lenses 85 ..Upper rim portion slotted 86 ..With lens retaining or locking means 87 ..Nose guards or pads integral with frame 88 ..Nose guards or pads removable or adjustable 89 ..With brace arm temple support 90 .Split rim mounting 91 ..With brow pieces or top arms 92 ...Screwless lens mounting 93 ..With brace arm supports for temple or lens 94 ..With auxiliary bridge 95 ..Expansible and contractible lens rim 96 ..Locking member secures lens against rotation 97 ..Split connected by U-clamps or pivot linkss 98 ..Split on nasal side of rim (i.e., at bridge) 99 ..Clamp and temple pivot screw spaced along rim clamping arm 100 ..Clamp and temple pivot screw coincident on rim clamping arm 101 ..Metal clamps embrace the rims and connect to bridge and/or temples 102 ..Combined metal and plastic rims 103 .Brace arm or semi-rimless mounting 104 ..Arm or rim of plastic or of different material (e.g., metal and plastic) 105 ..Detachable brace arm 106 ..Screwless lens mounting 107 ..With adjustable lens or frame part 108 ..Brace arm supports lens at two spaced points or constitutes a partial rim 109 ..Brace arm extends along edge of lens 110 .Rimless mounting 111 .Temples 112 ..With pocket clip or clasp 113 ..Spring biased 114 ..Resilient or flexible 115 ..Reversible or axially rotatable 116 ..Detachable 117 ..With covered core or rod (e.g., reinforced) 118 ..Extensible (e.g., with adjustable sleeve member 119 ..Two-part type (e.g., jointed) 120 ..Inclined to lens plane 121 ..With connector 122 ..With skin protecting earpiece covering 123 ..With head or ear engaging attachments 124 .Bridges 125 ..Crossbar type 126 ..Flexible 127 ...Ball or chain type 128 ..Adjustable 129 ..Reinforced 130 ..With auxiliary support 131 ..With nose grip or guard integral with bridge 132 ..With nose grip, nose guard, pad, or cushion 133 ..With connectors or straps 134 ...Unitary bridge and straps 135 ...With lens clamping straps 136 .Nose pads or cushions 137 ..Adjustable, rockable, or pivotable 138 ..Detachable 139 ..With cover or coating 140 .Connectors 141 ..With screw locking means 142 ..Strap type 143 ...With particular bracing bar or stud 144 ...With cementing or fusing 145 ...With cushion around lens screw or bolt 146 ....Sleeve or bushing 147 ...With serrated interengaging parts 148 ...Adjusting 149 ...With interengaging projection and recess 150 ...With resilient parts (e.g., resilient strap arms) 151 ....Spring between lens and strap 152 ...With clamping armss 153 ..With particular hinge 154 .Lens linings or rims 155 .With support or holder (e.g., on hat or cap) 156 ..With head embracing bow or chain 157 ..Neck retainers 158 .Combined 159 .Ophtahalmic lenses or blanks 160 R ..Eye contact type 161 ...Multifocal 162 ...Colored 160 H ...Hydrophilic 163 ..With light filtering means 164 ...Multifocal 165 ...With sections of different light absorption 166 ..With lens protective layers 167 ..Cataract correction type 168 ..Multifocal 169 ...Gradually varying focal power 170 ...With prismatic segment 171 ...Three or more foci 172 ...Multiple elements 173 ..Image size (aniseikonia) correction 174 ..With beveled, polished or reinforced edges 175 ..Prismatic type 176 ..Focus and/or astigmatism correction 177 ..Methods 178 .Methods (e.g., securing lenses in mountings)