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| Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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| Class 451 | ABRADING |
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![[List of Pre Grant Publications for class 451 subclass 1]](../as.gif) | ![[List of Patents for class 451 subclass 1]](../ps.gif) | 1 | PRECISION DEVICE OR PROCESS - OR WITH CONDITION RESPONSIVE CONTROL |
| | 2 |  Condition responsive control for sandblasting |
| | 4 | Tape controlled |
| | 5 | Computer controlled |
| | 6 | By optical sensor |
| | 7 | Controlling temperature |
| | 8 | With indicating |
| | 11 | With feeding of tool or work holder |
| | 28 | ABRADING PROCESS |
| | 29 | Utilizing shield (mask or stencil) |
| | 32 | Tumbling |
| | 33 |  Including temperature modification or control |
| | 34 | In at least one of plural abrading steps |
| | 35 | With auxiliary work treating or in critical fluent medium |
| | 36 | Utilizing fluent abradant |
| | 41 | Glass or stone abrading |
| | 45 | Razor, knife, or scissors sharpening |
| | 46 | Gauge abrading |
| | 47 | Gear or worm abrading |
| | 48 | Drill, thread, thread cutter, reamer, or rotary cutter abrading |
| | 49 | Roll, roller, shaft, ball, or piston abrading |
| | 51 | Ring, tube, bushing, sleeve, or cylinder abrading |
| | 53 | With critical temperature modification or control of work or abradant |
| | 54 | With critical nonabrading work treating |
| | 56 | With tool treating or forming |
| | 57 | Combined abrading |
| | 59 | Utilizing nonrigid tool |
| | 60 | Abradant supplying |
| | 61 | Hollow work |
| | 62 | Cam |
| | 63 | Side face of disk |
| | 64 | MACHINE |
| | 65 | Combined |
| | 74 | Graining box |
| | 75 | Sandblast |
| | 76 | Hollow interior work |
| | 77 | Spark plug |
| | 78 | Electrical device |
| | 79 | File |
| | 80 | Having moving work holder |
| | 85 | Having tumbling barrel |
| | 87 | Having particle recovery means |
| | 89 | Having sandblast chamber |
| | 90 | Having hand-directed sandblast nozzle |
| | 91 | Abradant propulsion means |
| | 99 | Abradant supply structure |
| | 101 | Valve structure |
| | 102 | Sandblast nozzle structure |
| | 103 | Scouring device |
| | 104 | Immersion |
| | 108 | Reciprocating scouring tool |
| | 109 | Rotary cylindrical scouring tool |
| | 111 | Rotary disk-shaped scouring tool |
| | 113 | Immersion |
| | 114 | By use of plural work holders, without tool |
| | 119 | Rotary reciprocating tool |
| | 120 | Cylindrical tool |
| | 121 |  Oscillating |
| | 124 | Rectilinear |
| | 125 |  Pattern and follower driver |
| | 126 | Blade reversing (e.g., razor blade) |
| | 127 | Compound rectilinear motion |
| | 128 | Harvester knife |
| | 129 | One-way work cut |
| | 130 | One-way work traverse |
| | 132 | Opposed |
| | 135 | Planetary |
| | 136 | Reciprocating work holder |
| | 139 | Swinging tool carrier |
| | 140 | Work rotating |
| | 150 | Rectilinearly reciprocating tool carriage |
| | 155 | Reciprocating spindle |
| | 158 | Disk tool |
| | 162 | Reciprocating tool |
| | 177 | Rotary tool |
| | 178 | Rotary cylinder |
| | 179 | Linear indexing of the tool |
| | 180 | Internal |
| | 182 | One-way work traverse |
| | 183 | Drawing reel |
| | 184 | Endless work carrier |
| | 186 | Nut and screw |
| | 188 | Roller work feed |
| | 190 | Opposed abrading tools |
| | 193 | Blade sharpener |
| | 194 | Opposed abrading tools |
| | 195 | Alternating tools |
| | 197 | Plunger infeeder |
| | 199 | Reciprocating work holder |
| | 207 | Roller work feed |
| | 209 | Work rotating |
| | 211 | Planetary |
| | 212 | Reciprocating work holder |
| | 213 | Rectilinear |
| | 214 |  Indexing |
| | 215 | Compound |
| | 216 | Rocking |
| | 218 | Work rotating |
| | 224 | Blade sharpener |
| | 225 | Harvester knife |
| | 226 | Rocking |
| | 229 | Blade sharpener |
| | 230 | Harvester knife |
| | 231 | Stationary work holder |
| | 236 | Swinging tool carrier |
| | 237 | Templet |
| | 241 | Work guide |
| | 242 | Work rotating |
| | 259 | Rotary disk |
| | 260 | One-way work traverse |
| | 262 | Opposed abrading tools |
| | 270 | Orbital |
| | 272 | Reciprocating work holder |
| | 278 | Stationary work holder |
| | 280 | Swinging tool carrier |
| | 281 | Templet |
| | 282 | Work guide |
| | 283 | Work rotating |
| | 293 | Blade sharpener |
| | 294 | Means to rotate tool |
| | 296 | Endless band tool |
| | 297 | Belt tracking |
| | 298 | Chain |
| | 299 | One-way work traverse |
| | 302 | Opposed endless band abrading tools |
| | 303 | Presser or former |
| | 304 | Reciprocating band carrier |
| | 305 | Reciprocating work holder |
| | 307 | Rotary work holder |
| | 309 | Superposed endless band tools |
| | 310 | Swinging band carrier |
| | 311 | Tension device |
| | 312 | Stationary tool |
| | 326 | Tumbling device |
| | 331 | WORK FEEDER |
| | 340 | FRAME OR MOUNT |
| | 341 | Double treadle |
| | 342 | For hanging rigid, rotary abrading tool |
| | 344 | Portable abrader |
| | 345 | Button cleaner |
| | 346 | Calk sharpener |
| | 347 | Rail abrader |
| | 348 | Roll or wheel abrader |
| | 349 | Edge-tool sharpener |
| | 350 | Floor surfacing machine |
| | 354 | Wall surfacing machine |
| | 355 | Endless band tool |
| | 356 | Reciprocating tool |
| | 357 | Orbital motion tool |
| | 358 | Rotary cylinder tool |
| | 359 | Rotary disk tool |
| | 360 | Rotary tool supporter |
| | 364 | WORK HOLDER |
| | 365 | Clamp |
| | 366 | Work oscillating |
| | 367 | Edge tool |
| | 368 | Seat controlled |
| | 369 | Gauging device |
| | 372 | Harvester knife |
| | 374 | Rotary cutter |
| | 377 | Work reciprocating |
| | 378 | Portable |
| | 379 | Work rotating |
| | 380 | Angularly adjustable |
| | 381 | Hollow work |
| | 383 | Skate |
| | 384 | Lens holder |
| | 385 | Work rotating |
| | 386 | Portable |
| | 387 | Angularly adjustable |
| | 388 | Vacuum |
| | 389 | Drop or dop stick |
| | 390 | Lens or prism |
| | 391 | Portable |
| | 392 | Work reciprocating |
| | 397 | Work rotating |
| | 402 | Rotary |
| | 403 | Indexing |
| | 405 | Angularly adjustable |
| | 406 | WORK REST |
| | 411 | WORK TABLE |
| | 415 | ATTACHMENT |
| | 416 | To textile machine to abrade card |
| | 418 | To electrical machine to abrade commutator |
| | 419 | To cutting machine to sharpen blade |
| | 424 | Roll or wheel abrader |
| | 429 | To rail |
| | 430 | Valve or valve seat abrader |
| | 432 | To sewing machine |
| | 434 | To vehicle |
| | 435 | To lathe |
| | 438 | To work guide |
| | 439 | To the work |
| | 440 | Internal abrader |
| | 441 | Orbital tool |
| | 442 | ACCESSORY |
| | 443 | Dressing |
| | 444 | Tool cleaner |
| | 445 | Erasing shield |
| | 446 | Abradant supplying |
| | 448 | Button cleaning shield |
| | 449 | Cooling |
| | 451 | Guard or housing |
| | 452 | Breakage guard |
| | 453 | Collector |
| | 454 | Drive shield |
| | 455 | Spark or splash guard |
| | 456 | Suction |
| | 457 | Work guard |
| | 458 | Abrading sheet applying device |
| | 459 | Strop surface renewing |
| | 460 | Work-mounting device |
| | 461 | COMBINED TOOL |
| | 463 | CARRIER FOR RELATIVELY MOVABLE SIMULTANEOUSLY USABLE TOOLS |
| | 464 | For radially movable tools |
| | 465 | Centrifugal force urged tools |
| | 470 | Including conoid or wedge tool moving member |
| | 471 | With threaded operator |
| | 472 | To move conoid member |
| | 473 | To actuate pivotally mounted tools |
| | 474 | For movement of conoid members relative to each other |
| | 475 | By conoid member with screw threads |
| | 476 | Including plural conoid members |
| | 477 | Including key-way or spline |
| | 478 | Conoid member |
| | 479 | Including gear actuated tool mover |
| | 480 | Including lever actuated tool mover |
| | 481 | Including hydraulically actuated tool mover |
| | 482 | Including thread actuated tool mover |
| | 484 | Including resiliently urged tool |
| | 486 | Including tools resiliently urged toward work |
| | 487 | CARRIER FOR A RADIALLY MOVABLE TOOL |
| | 488 | VENTILATION OR COOLING OF TOOL OR TOOL SUPPORT |
| | 489 | FLEXIBLE-MEMBER TOOL MOUNTED ON PLURAL ROLLS |
| | 490 | TOOL SUPPORT FOR FLEXIBLE-MEMBER TOOL |
| | 491 | With tool supply or storage |
| | 494 | Having magnetic or suction tool holding means |
| | 495 | Contour-adjustable support |
| | 496 | Including tool holding slot in rotary tool support |
| | 502 | Including longitudinal tool holding slot |
| | 504 | Including expansible external surface |
| | 508 | Including headed, axially disposed, tool holding member on rotary support |
| | 509 | Tool holding member disconnected from support by partial rotation |
| | 510 | With threaded means to retain tool holding member |
| | 512 | Including taper or wedge tool holding member |
| | 513 | Including endless band tool holding member |
| | 514 | Including resiliently urged tool holding member |
| | 515 | Separable |
| | 516 | Rotatable |
| | 517 | Biased for tool disengagement |
| | 518 | Cantilever-spring actuated |
| | 519 | Coil-spring actuated |
| | 520 | Including tool holder having tool surface depressor |
| | 521 | Including threaded means to retain tool holder |
| | 523 | Manually manipulated |
| | 526 | FLEXIBLE-MEMBER TOOL, PER SE |
| | 527 | Interrupted or composite work face (e.g., cracked, nonplanar, etc.) |
| | 530 | Work face variegated or on projecting backing |
| | 531 | Splice or joint |
| | 532 | Comprising fibers |
| | 533 | Laminate |
| | 540 | RIGID TOOL |
