| Subclass |
| Title |
|---|
|
ClassTitle
|
| ===>
EDUCATION AND DEMONSTRATION
|
| | | |
| 1 | ![[Patents]](../gifs/ps.gif) | DETECTION OR RANGE DETERMINATION OF DISTANT OBJECT BY APPARATUS USING SENSOR OF ELECTROMAGNETIC OR SOUND ENERGY |
| 2 | | . Radar |
| 3 | | . . Cathode ray screen display simulated by light means (e.g., light spot projected onto screen, etc.) |
| 4 | | . . Optical means (e.g., image projector, etc.) or light or sound sensor (e.g., television camera, microphone, etc.) included in a simulator |
| 5 | | . . Interference simulation |
| 6 | | . Sonar |
| 7 | | . . Interference simulation |
| 8 | | . . Simulation of Doppler shift of echo |
| 9 | | . . Simulation of plural detector system |
| 10 | | . . Simulation by use of sound recording |
| 11 | | ORGANIZED ARMED OR UNARMED CONFLICT OR SHOOTING |
| 12 | | . Self-propelled projectile |
| 13 | | . . Launched underwater |
| 14 | | . Aerial warfare |
| 15 | | . . Bombing |
| 16 | | . Gunnery |
| 17 | | . . Gunfire spotting |
| 18 | | . . Gun recoil simulation |
| 19 | | . . Gun aiming |
| 20 | | . . . Cinematographic or cathode ray screen display |
| 21 | | . . . Training apparatus using beam of infrared, visible light, or ultraviolet radiation |
| 22 | | . . . . Beam sensor included in apparatus |
| 23 | | . . . Means (e.g., target, terrain model, etc.) marked or pierced to simulate projectile impact point |
| 24 | | . . Gun loading or projectile preparation (e.g., fuse setting, etc.) |
| 25 | | . Water warfare |
| 26 | | . . Periscope view simulation |
| 27 | | . Range finding |
| 28 | | AIRCRAFT WIND DRIFT SIMULATION |
| 29 | | VEHICLE OPERATOR INSTRUCTION OR TESTING |
| 30 | | . Flight vehicle |
| 31 | | . . Automatic pilot |
| 32 | | . . Model viewed and maneuvered by trainee from point remote therefrom |
| 33 | | . . Helicopter |
| 34 | | . . Outer space vehicle |
| 35 | | . . In flight |
| 36 | | . . . With simulation of night or reduced visibility flight |
| 37 | | . . Aircraft, aircraft simulator, or means connected thereto traveling on ground or water during simulated flight training |
| 38 | | . . Simulation of view from aircraft |
| 39 | | . . . View simulating means located on belt or cylinder |
| 40 | | . . . View simulating means located on element having spherical surface |
| 41 | | . . . Simulation of night or reduced visibility flight |
| 42 | | . . . . Runway outlining or approach lights simulated |
| 43 | | . . . View simulated by cathode ray screen display |
| 44 | | . . . View simulated by projected image |
| 45 | | . . Simulation of feel of control means (e.g., flight control stick, etc.) |
| 46 | | . . Ground trainer agitated to simulate rough air buffeting or engine induced vibration of aircraft |
| 47 | | . . Display or recordation of simulated flight path of ground trainer |
| 48 | | . . Aircraft sound simulation |
| 49 | | . . Aircraft or ambient condition simulated electrically or indicated by instrument or alarm |
| 50 | | . . . Takeoff or preparation therefor |
| 51 | | . . . Aircraft attitude (e.g., roll, etc.) |
| 52 | | . . . Ice formation or aircraft weight |
| 53 | | . . . Pressure |
| 54 | | . . . Propulsion means or accessory |
| 55 | | . . Tiltable or turnable ground trainer |
| 56 | | . . . With fan or simulated propeller |
| 57 | | . . . With means for stabilizing trainer when idle |
| 58 | | . . . By fluid actuated piston/cylinder ram |
| 59 | | . . Simulation of flight generated force applied to aircraft occupant |
| 60 | | . Sail-equipped vehicle |
| 61 | | . Bicycle or motorcycle |
| 62 | | . Automobile or truck |
| 63 | | . . Model viewed and maneuvered by trainee from point remote therefrom |
| 64 | | . . Driver's skill measured by time or vehicle travel distance |
| 65 | | . . Recordation of driver's performance |
| 66 | | . . Real vehicle used in instruction or testing |
| 67 | | . . . Vehicle positioned on rollers, belt, or platform |
| 68 | | . . . Obstacle or other means contacted by improperly driven vehicle |
| 69 | | . . Simulation of view from vehicle |
| 70 | | . . . View simulating means located on belt or cylinder |
| 71 | | . . Manipulation of gear shift lever or clutch pedal |
| 72 | | ARCHITECTURE, INTERIOR DECORATION, OR INDUSTRIAL PLANT LAYOUT |
| 73 | | . Magnet included in display or demonstration |
| 74 | | . Brick, tile, roofing, or siding |
| 75 | | . Curtain or wall, ceiling, or floor cover |
| 76 | | . . Light, mirror, or image projector included in display or demonstration |
| 77 | | . . Roller-mounted belt or strip included in display or demonstration |
| 78 | | . . Plaque (e.g., disk, etc.) turnable relative to index (e.g., window in card, etc.) to selectively align different points on plaque therewith |
| 79 | | . . Building or room interior represented pictorially or by model |
| 80 | | . Representation of furniture, bathroom or kitchen accessory, or cabinet placeable in different locations on representation of room interior |
| 81 | | VISUAL ART OR CRAFT, ARTISTIC ADORNMENT, OR COLOR TRAINING OR DEMONSTRATION |
| 82 | | . Sculpture or craft involving manual carving or shaping |
| 83 | | . Shape defined by filament (e.g., string, etc.) |
| 84 | | . Color application (e.g., painting, etc.) |
| 85 | | . Drawing |
| 86 | | . . Animal or human body model having movable parts |
| 87 | | . . Stencil |
| 88 | | . . Tracing |
| 89 | | . . Model support |
| 90 | | . . Grid included in drawing aid or scene viewer |
| 91 | | . . Perspective |
| 92 | | . . Orthogonal projection |
| 93 | | . Flower arranging or landscaping |
| 94 | | . Hair or wig styling |
| 95 | | . Decorative sewing, needlework, weaving, or textile designing |
| 96 | | . Design formed of identical or complementary elements |
| 97 | | . . Strips |
| 98 | | . Color display |
| 99 | | . . Personal appearance or wearing apparel |
| 100 | | . . . Cosmetic or nail polish |
| 101 | | . . Produced by spinning means (e.g., plural rotating color disks, etc.) |
| 102 | | . . Produced by superposed color filters |
| 103 | | . . Including mixing receptacle or holder for color material |
| 104 | | . . Including relatively rotatable elements (e.g., concentrically mounted color disks, etc.) |
| 105 | | . . Automobile |
| 106 | | ASTROLOGY |
| 107 | | BUSINESS OR ECONOMICS |
| 108 | | . Work schedule |
| 109 | | . Record keeping |
| 110 | | . Coin or currency identification or counterfeit detection |
| 111 | | CELESTIAL NAVIGATION |
| 112 | | COMMUNICATION AIDS FOR THE HANDICAPPED |
| 113 | | . Tactile reading aid (e.g., Braille, etc.) |
| 114 | | . . Converting information to tactile output |
| 115 | | . . Braille writing slate |
| 116 | | . Converting information to sound |
| 117 | | . Writing guide for the blind |
| 118 | | COMPUTER LOGIC, OPERATION, OR PROGRAMMING INSTRUCTION |
| 126 | | FLUID FLOW OR WAVE MOTION |
| 127 | | FOOD |
| 128 | | GAME, BOARD OR TABLE TYPE |
| 129 | | . Using playing card |
| 130 | | GEOGRAPHY |
| 131 | | . Terrestrial globe or accessory therefor |
| 132 | | . . Relief globe |
| 133 | | . . Having diverse use (e.g., pencil box, etc.) |
| 134 | | . . Having magnet associated therewith |
| 135 | | . . Having plural planar or curved surfaces (e.g., flat or frustoconical surfaces, etc.) |
| 136 | | . . Rotated by mechanical drive |
| 137 | | . . Collapsible or arranged for convenient assembly, disassembly, or storage |
| 138 | | . . . Inflatable |
| 139 | | . . With means representing vehicle moving relative to earth |
| 140 | | . . . Space vehicle |
| 141 | | . . With means indicating distance between points on earth |
| 142 | | . . With means indicating time at different points on earth |
| 143 | | . . With means demonstrating solar illumination of earth |
| 144 | | . . With means demonstrating wind currents over earth |
| 145 | | . . With internal light |
| 146 | | . . With means to facilitate finding or reading indicia thereon |
| 147 | | . . With map segment attachable thereto (e.g., continent, nation, etc.) |
| 148 | | . . With suspension type support |
| 149 | | . Means indicating time at different points on earth |
| 150 | | . Map or terrain model |
| 151 | | . . With model or sample of natural or man-made item associated therewith |
| 152 | | . . Relief |
| 153 | | . . Means for facilitating location of different points on map |
| 154 | | HISTORY OR GENEALOGY |
| 155 | | IDENTIFICATION OF PERSON OR HANDWRITING ANALYSIS |
| 156 | | LANGUAGE |
| 157 | | . Foreign |
| 158 | | . Shorthand |
| 159 | | . Alphabet letter formation, recognition, or sequencing |
| 160 | | . . Letter formed by segments |
| 161 | | . . Letter displayed upon manipulation of mechanism |
| 162 | | . Writing or printing by hand |
| 163 | | . . Tracing |
| 164 | | . . . Slotted or grooved path |
| 165 | | . . Writing sample included in teaching means |
| 166 | | . . Mechanical means for teaching proper position of body part while writing |
| 167 | | . Spelling, phonics, word recognition, or sentence formation |
| 168 | | . . Magnet included in teaching means |
| 169 | | . . Electrical component included in teaching means |
| 170 | | . . Color used in teaching means |
| 171 | | . . Letter or word bearing elements (e.g., cards, blocks, etc.) with interfitting surface configurations |
| 172 | | . . Letter-bearing elements (e.g., cards, blocks, etc.) selectively aligned to form word or sentence |
| 173 | | . . . Letter-bearing belt or reel-mounted strip |
| 174 | | . . . Rotatably mounted letter bearing element |
| 175 | | . . . Letter-bearing elements slidable between different grooves |
| 176 | | . . Display of word or picture upon correct manipulation of teaching means |
| 177 | | . . Crossword puzzle aid |
| 178 | | . . Reading |
| 179 | | . . . Speed |
| 180 | | . . . . Projected image of reading matter |
| 181 | | . . . . Apertured mask moved past reading matter carrier |
| 182 | | . . . . Reading matter carrier moved past viewing position |
| 183 | | . . . . Pacer moved down reading matter carrier |
| 184 | | . . . Directionality training (e.g., for dyslexics, etc.) |
| 185 | | . Speech |
| 186 | | MAGNETIC OR GYRO COMPASS |
| 187 | | MEASUREMENT OF LENGTH OR VOLUME |
| 188 | | MATHEMATICS |
| 189 | | . Base conversion or use of base other than ten |
| 190 | | . Magnet included in teaching means |
| 191 | | . Arithmetic |
| 192 | | . . Chalkboard or equivalent means having readily erasable surface |
| 193 | | . . Manually manipulated numeral shaped elements |
| 194 | | . . Numeric value represented by weight placed on balance |
| 195 | | . . Manually manipulated elements having size proportional to numeric value |
| 196 | | . . . Fraction representing elements |
| 197 | | . . Indicia-bearing belt or reel-mounted strip |
| 198 | | . . Plaque (e.g., disk, etc.) turnable relative to index (e.g., window in card, etc.) to selectively align different points on plaque therewith |
| 199 | | . . Plaque slidable relative to index (e.g., window in card, etc.) to selectively align different points on plaque therewith |
| 200 | | . . Manually manipulated pin or peg |
| 201 | | . . Electric component included in teaching means |
| 202 | | . . Keyboard or like manually manipulated array (e.g., slides, levers, etc.) |
| 203 | | . . Apertured elements threaded on elongate means (e.g., abacus, etc.) |
| 204 | | . . . Elements manually placed on or removed from elongate means during use |
| 205 | | . . Means having number of marks (e.g., dots, etc.) or associated physical units (e.g., sticks, indentations, etc.) corresponding to numeric value |
| 206 | | . . Rotatable wheel-shaped element (e.g., ring, disc, cylinder, etc.) having indicia on perimeter thereof |
| 207 | | . . Color used in teaching means |
| 208 | | . . Ball, block, or disk |
| 209 | | . . Division or multiplication |
| 210 | | . . Place value relative to decimal point |
| 211 | | . Geometry, trigonometry, or physical mathematic model structure |
| 212 | | . . Pythagorean theorem |
| 213 | | . . Property of sphere or spheroid |
| 214 | | . . Property of circle or ellipse |
| 215 | | . . Demonstration means using relatively turnable elements |
| 216 | | . . Demonstration means using filament (e.g., string, etc.) to define geometric shape |
| 217 | | METEOROLOGY |
| 218 | | NUCLEAR ENERGY OR RADIOACTIVE RADIATION DETECTION OR SIMULATION |
| 219 | | OCCUPATION |
| 220 | | . Air traffic control |
| 221 | | . Audiometry |
| 222 | | . Code communication |
| 223 | | . . Visual signalling |
| 224 | | . Electricity or electronics |
| 225 | | . Dairying, farming, ranching, or other occupation involving care of plants or animals |
| 226 | | . Fire fighting |
| 227 | | . Keyboard operation (e.g., typing, key punching, etc.) |
| 228 | | . . Means for selectively illuminating character on simulated keyboard |
| 229 | | . . Means for selectively rendering key operable or inoperable |
| 230 | | . . Means for selectively producing sound of character |
| 231 | | . . Practice keyboard having individually depressible keys |
| 232 | | . . . With means to display character upon depression of key |
| 233 | | . . Means on hand or finger for indicating finger to be used |
| 234 | | . Soldering or welding |
| 235 | | PARLIAMENTARY PROCEDURE |
| 236 | | PSYCHOLOGY |
| 237 | | . Cooperation of plural pupils |
| 238 | | . Behavior or performance display (e.g., board for showing completed chores, etc.) |
| 239 | | RADIO NAVIGATION |
| 240 | | . Light sensor included in simulator of radio navigation equipment |
| 241 | | . Simulation of upwardly directed airfield or landing approach marker radio beam |
| 242 | | . Simulated radio signal generated by use of data storage means |
| 243 | | . Simulated bearing or position or vehicle relative to radio transmitter or directional beam indicated to trainee by instrument |
| 244 | | . Simulation of radio directional beam carrying Morse code signal |
| 245 | | RELIGION |
| 246 | | . Rosary |
| 247 | | PHYSICAL EDUCATION |
| 248 | | . Basketball |
| 249 | | . Bowling |
| 250 | | . Dancing |
| 251 | | . Football, soccer, or rugby |
| 252 | | . Golf |
| 253 | | . Skiing |
| 254 | | . Swimming |
| 255 | | . Traversing ground (e.g., crawling, running, etc.) |
| 256 | | . Body model with articulated parts |
| 257 | | . Picture or image of body included in display or demonstration |
| 258 | | . Developing or testing coordination |
| 259 | | . . Associating dissimilar objects with apertures or pegs having matching size, shape, or color |
| 260 | | . . Manipulation of tool or fastener (e.g., zipper, shoelaces, etc.) |
| 261 | | . . Tracing |
| 262 | | ANATOMY, PHYSIOLOGY, THERAPEUTIC TREATMENT, OR SURGERY RELATING TO HUMAN BEING |
| 263 | | . Dentistry |
| 264 | | . . Means mounting upper and lower tooth models for relative movement |
| 265 | | . Cardiac massage or artificial respiration |
| 266 | | . Simulation of body sound |
| 267 | | . Anatomical representation |
| 268 | | . . Simulation of flow of body liquid |
| 269 | | . . Including superposed sheets respectively depicting different body parts |
| 270 | | . . Head or part thereof |
| 271 | | . . . Eye |
| 272 | | . . Internal organ, blood vessel, or nerve |
| 273 | | . . . Female genital |
| 274 | | . . Skeleton or bone |
| 275 | | . . . Palpation or manual force application (e.g., chiropractic adjustment, etc.) |
| 276 | | SCIENCE |
| 277 | | . Crystal structure model or display having discrete element (e.g., geometric shape, light, etc.) representing atom |
| 278 | | . Molecular model or display having discrete element representing atom or radical |
| 279 | | . . Model having helical chain of elements (e.g., DNA model, etc.) |
| 280 | | . . Atom or radical represented by element formed of sheet material |
| 281 | | . Model or display demonstrating structure or property of atom or radical |
| 282 | | . . Indicia chart (e.g., periodic table, etc.) |
| 283 | | . Means demonstrating physical property (e.g., osmotic pressure, solubility, etc.) of substance |
| 284 | | . Astronomy |
| 285 | | . . Representation of light generating celestial body |
| 286 | | . . . Light spot |
| 287 | | . . . Celestial globe |
| 288 | | . . . . And earth representation |
| 289 | | . . . Finding or identifying aid |
| 290 | | . . . Simulation of sun and earth |
| 291 | | . . . . Simulation of motion of earth and another major planet around sun |
| 292 | | . . . . And moon |
| 293 | | . . . . . Moon model moved around earth model by mechanical or electrical means |
| 294 | | . . . . . . By belt drive |
| 295 | | . Biology or taxidermy |
| 296 | | . . Specimen display |
| 297 | | . . . Specimen enclosure |
| 298 | | . Chemistry or metallurgy |
| 299 | | . Geology |
| 300 | | . Physics |
| 301 | | . . Electricity or magnetism |
| 302 | | . . Statics or dynamics |
| 303 | | . . Optics |
| 304 | | TELLING TIME OR CALENDAR READING |
| 305 | | VEHICLE MOVEMENT OR TRAFFIC ACCIDENT OR CONDITION |
| 306 | | VOTING MACHINE OR BALLOT MARKING |
| 307R | | CATHODE RAY SCREEN DISPLAY AND AUDIO MEANS |
| 307A | | . Karaoke |
| 308 | | AUDIO RECORDING AND VISUAL MEANS |
| 309 | | . Common carrier for visual means and audio recording |
| 310 | | . . Carrier used with image projector |
| 311 | | . . Card, sheet, or block |
| 312 | | . . . Reading head moved past stationary audio track |
| 313 | | . . . . Manually |
| 314 | | . Image projector |
| 315 | | . . With code on image carrier for controlling operation of apparatus |
| 316 | | . . With code on audio carrier for controlling operation of apparatus |
| 317 | | . Visual information in book form |
| 318 | | . Audio recording on disk |
| 319 | | AUDIO RECORDING |
| 320 | | . Listener's voiced response recorded |
| 321 | | . Operation of apparatus controlled by listener's response to question or problem |
| 322 | | QUESTION OR PROBLEM ELICITING RESPONSE |
| 323 | | . Cathode ray screen display included in examining means |
| 324 | | . Image projector included in examining means |
| 325 | | . . And light detector |
| 326 | | . Mark transfer sheet (e.g., carbon paper, etc.) included in examining means |
| 327 | | . Correctness of response indicated to examine by self-operating or examinee actuated means |
| 328 | | . . Involving heat or chemical reaction |
| 329 | | . . Involving fluid flow |
| 330 | | . . Involving magnetic attraction |
| 331 | | . . By optical element (e.g., mirror, color filter, lens, etc.) |
| 332 | | . . Reward dispensed for correct answer |
| 333 | | . . Picture or pattern completed by examinee placing plaques bearing portions thereof in correct relation |
| 334 | | . . Hand-held element insertable to different depths in apertures respectively representing right and wrong answers |
| 335 | | . . By means including electrical component |
| 336 | | . . . Response of plural examinees communicated to monitor or recorder by electrical signals |
| 337 | | . . . Light detector |
| 338 | | . . . Part of electric circuit completed when examinee places end of flexible lead, or means connected thereto (e.g., plug, etc.), in contact with another element |
| 339 | | . . . Part of electric circuit completed when examinee depresses portion of sheet having electric conductor associated therewith |
| 340 | | . . . Part of electric circuit completed when examinee places free element in contact with another element |
| 341 | | . . . . Correct answer indicator lamp carried by free element |
| 342 | | . . . Question or problem located on endless belt or reel mounted strip |
| 343 | | . . . Size or shape of, or aperture in, free element controls indication of response correctness |
| 344 | | . . . Correct answer illuminated |
| 345 | | . . Size or shape of, or aperture in, free element cntrols indication of response correctness |
| 346 | | . . Correctness of response indicated when examinee physically alters element other than by marking it |
| 347 | | . . Correct answer displayed on side of element opposite side displaying question or problem |
| 348 | | . . Correct answer hidden until examinee moves element |
| 349 | | . . . Means for receiving examinee's written response |
| 350 | | . Response of plural examinees communicated to monitor or recorder by electrical signals |
| 351 | | . . Wireless signals |
| 352 | | . . With means for indicating first examinee to respond |
| 353 | | . Grading of response form |
| 354 | | . . Comparison of response form with standard answer form |
| 355 | | . . . Light detector sensing response |
| 356 | | . . . Electrical means sensing conductive mark representing response |
| 357 | | . . . Means sensing aperture representing response |
| 358 | | . . Light detector sensing response |
| 359 | | . . Electrical means sensing conductive mark representing response |
| 360 | | . . Means sensing aperture representing response |
| 361 | | . . Means perforating response form at correct answer location |
| 362 | | . Electrical means for recording examinee's response |
| 363 | | . Card or sheet for receiving examinee's written, marked, or punched response |
| 364 | | . . With apertured overlay |
| 365 | | MEANS FOR DEMONSTRATING APPARATUS, PRODUCT, OR SURFACE CONFIGURATION, OR FOR DISPLAYING EDUCATION MATERIAL OR STUDENT'S WORK |
| 366 | | . Means for simulating abnormal condition |
| 367 | | . Means for comparing characteristics of plural articles or materials |
| 368 | | . Superposed indicia bearing sheets, one depicting interior view |
| 369 | | . Means for displaying article at various stages of manufacture or treatment |
| 370 | | . Transparent means permitting interior view |
| 371 | | . Mirror for displaying something (e.g., apparel, hair style, etc.) as it would appear when associated with viewer |
| 372 | | . Aircraft, spacecraft, or component thereof |
| 373 | | . Land or water vehicle (e.g., automobile, boat, etc.) or component thereof |
| 374 | | . . Servicing aid (e.g., lubrication chart, etc.) |
| 375 | | . . Shock absorber or spring |
| 376 | | . . Tire, wheel, or brake |
| 377 | | . Beauty aid or perfume |
| 378 | | . Burial means or grave maker |
| 379 | | . Demonstration or display of electrical apparatus or component |
| 380 | | . . Motor or generator |
| 381 | | . Fluid filter |
| 382 | | . Household equipment |
| 383 | | . . Refrigerator or air conditioner |
| 384 | | . . Vacuum cleaner |
| 385 | | . Insulation |
| 386 | | . Jewelry or monogram |
| 387 | | . Lock or safe |
| 388 | | . Lubricant or lubrication |
| 389 | | . Mechanical power source (e.g., engine, windmill, etc.) |
| 390 | | . Mining |
| 391 | | . Pen or pencil |
| 392 | | . Sport equipment |
| 393 | | . Toy |
| 394 | | . Timepiece or component thereof |
| 395 | | . Wearing apparel |
| 396 | | . . Displayed on doll or manikin |
| 397 | | . . Footwear |
| 398 | | . . . Hose |
| 399 | | . . Headwear |
| 400 | | . . Neckwear |
| 401 | | . Machine mechanism |
| 402 | | . Rotatable element having indicia or picture on perimeter thereof |
| 403 | | . Block or like manually manipulatable object having indicia or picture on face thereof, or three-dimensional form for demonstrating shape |
| 404 | | . Plaque (e.g., disk, etc.) turnable relative to index (e.g., window in card, etc.) to selectively align different points on plaque therewith |
| 405 | | . Plaque slidable relative to index (e.g., window in card, etc.) to selectively align different points on plaque therewith |
| 406 | | . Jigsaw elements having indicia thereon |
| 407 | | . Manually manipulated pin or peg inserted into display board |
| 408 | | . Chalkboard or equivalent means having easily erasable surface |
| 409 | | . . Mark formed by magnetic attraction between materials (e.g., particles in sheet made visible by movement of magnet over sheet, etc.) |
| 410 | | . . Mark formed by bonding sheet to underlying surface with pressure-applying stylus (e.g., Magic Slate, etc.) |
| 411 | | . . Erasable surface on endless belt |
| 412 | | . . Erasable surface on reel-mounted sheet |
| 413 | | . . Separate elements having erasable surfaces |
| 414 | | . . . Relatively swingable |
| 415 | | . . With pencil holder or sharpener |
| 416 | | . . With chart, illustration, or indicia |
| 417 | | . . Chalkboard cleaning means, chalk or eraser holder, or chalk dust receiver |
| 418 | | . . With ruler, straight edge, or holder therefor |
| 419 | | . . Pivotal about horizontal axis |
| 420 | | . . Vertically adjustable |
| 421 | | . . Attached to wall |
| 422 | | . . Hand-carried school slate |
| 423 | | . . . With rigid corner cap or separate means holding slate frame elements together |
| 424 | | . . . With cushion or noise muffler attached to slate frame |
| 425 | | . . Artificial slate formed of plural constituents |
| 426 | | . Endless belt or reel-mounted strip having indicia thereon |
| 427 | | . Apertured mask placed over information bearing surface |
| 428 | | . Pictorial demonstration or display |
| 429 | | . Demonstration or display means combined with storage or collection means (e.g., receptacle, scoop, etc.) |
| 430 | | . Display panel, chart, or graph |
| 431 | | . . Showing seat or desk location |
| 432 | | DESK, TABLE, OR STUDY BOOTH |
| 433 | | MISCELLANEOUS |
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