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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Class Number: 353 Class Title: OPTICS: IMAGE PROJECTORS Subclass Subclass Number Title 1 KALEIDOSCOPIC 2 .Including particles loosely housed for agitation 3 HELIOSTATS 4 ASCENDING HEATED AIR CHANGES PICTURES 5 MAPPING OR AERIAL PHOTOGRAPH RECTIFYING 6 .Stereoscopic 7 STEREOSCOPIC 8 .Polarizer 9 .Slide transfer mechanism 10 RELIEF ILLUSION 11 TARGET, MAP OR NAVIGATION PROJECTION 12 .With or for vehicle 13 WITH OR FOR VEHICLE 14 .Instrument indicator 15 WITH SOUND ACCOMPANIMENT 16 .Phonograph 17 ..In carrying case 18 ..Cabinet encloses projector and one side of screen 19 .Common picture and sound record carrier system 20 POLARIZER OR INTERFERENCE FILTER 21 EDITING OR AUXILIARY VIEWING 22 TRANSPARENT PLATE 23 .Plate part of film gate 24 ..Including lens support 25 SELECTIVE DATA RETRIEVAL 26 R .Film strip 26 A ..Automatic 27 R .Plural picture rows on single microcard 27 A ..Automatic 28 PROJECTED IMAGE COMBINED WITH REAL OBJECT 29 ADDITIONAL ILLUMINATION OF OR NEAR PROJECTED IMAGE 30 COMPOSITE PROJECTED IMAGE 31 .Multicolor picture 32 ..Lenticular film 33 ..Prism 34 .Plural projection paths with single light source 35 .Slides and/or film superposed in projector 36 .Letters or numbers 37 .Reflector between lamp and screen 38 UNITARY PLURAL REFRACTING SURFACES 39 MICROPROJECTOR 40 SCALE OR SCALE INDICATOR PROJECTOR 41 .Vernier or plural scales 42 POINTER 43 GUN, FLASHLIGHT OR BATTERY OPERATED TYPE 44 SIMULTANEOUS PROJECTION AND MANUAL DELINEATION 45 .Score register 46 IMAGE MOVES ON SCREEN 47 .Cabinet enclosed projector and one side of screen 48 .Plural projectors or projection paths 49 ..Single light source 50 .Reflector between lamp and screenn 51 ..Plural 52 TEMPERATURE CONTROL 53 .Means to preheat slides or film 54 .Liquid coolant 55 .Heat filter 56 .Heat resistant or insulating material 57 .Blower 58 ..Plural 59 ..Common motor for blower and slide changer 60 ..Air directed against face or back of object 61 ..Particular air ducts or deflector 62 STENCIL OR PERFORATED PLATE PROJECTOR (E.G., SKY OR CLOUD PROJECTOR) 63 EPIDIASCOPE (I.E., SELECTIVE OPAQUE AND TRANSPARENCY PROJECTOR) 64 .Plural reflectors between lamp and screen 65 EPISCOPE (I.E., OPAQUE PROJECTOR) 66 .Reflector between lamp and screen 67 ..Cabinet encloses projector and one side of screen 68 SELECTIVE SLIDE AND FILM STRIP PROJECTOR 69 DISTORTION COMPENSATION 70 .For projection axis inclined to screen 71 SELECTIVE PROJECTION ON DISTANT OR CABINET SCREEN 72 PROJECTOR OR SCREEN REMOVABLE FROM COMMON HOUSING 73 .Plural reflectors between lamp and screen 74 CABINET ENCLOSES PROJECTOR AND ONE SIDE OF SCREEN 75 .Light shield, mask, hood, or diaphragm 76 .Focus or variable magnification 77 .Reflector between lamp and screen 78 ..Plural 79 STRUCTURALLY RELATED PROJECTOR AND SCREEN 80 .Profile or silhouette 81 PRISM IN LIGHT PATH 82 PLURAL PROJECTION PATHS WITH SINGLE LIGHT SOURCE 83 .Dissolve type 84 COLOR FILTER 85 LAMP CONTROL 86 .Dissolve type 87 .Lamp position adjustable 88 SHUTTER 89 .Plural projection paths 90 ..Dissolve type 91 .Solenoid operated 92 .Slides reciprocated horizontally from magazine 93 .Dissolve type 94 PLURAL 95 FILM GATE 96 .And lens support 97 LIGHT SHIELD, MASK, HOOD, OR DIAPHRAGM 98 REFLECTOR 99 .Plural 100 LENS SUPPORT 101 .Lens position adjustable 102 PARTICULAR CONDENSER 103 SLIDE TRANSFER MECHANISM 104 .For slides of various dimensions 105 .Magnetically operated 106 ..Solenoid 107 ...Rotary slide carrierr 108 .Slides fixed to movable carrier 109 ..Endless chain or belt 110 ..Disc 111 .Gravity operated 112 ..Feeder magazine and receptacle 113 .Feeder magazine and receiver magazine 114 .Slides reciprocated horizontally 115 ..Slides elevated 116 ..From magazine 117 ...Rotary magazine 118 .Slides gripped or hooked 119 HOUSING 120 PICTURE CARRIER 121 METHODS 122 MISCELLANEOUS * ****************************** * DIGESTS * ****************************** DIG 1 Slides stacked with surface to surface contact DIG 2 Film strip DIG 3 Transparent DIG 4 Opaque DIG 5 Transparency holder accessories DIG 6 Head accessories