Subclasses list

• 301 Borehole type 
  Patents: 58
  Patent Applications: 11
• 302 With heat exchange fluid 
  Patents: 6
  Patent Applications: 0
• 303 With vapor generator 
  Patents: 10
  Patent Applications: 1
• 304 Heating element surrounding delivery pipe 
  Patents: 8
  Patent Applications: 0
• 305 Suspended by cable in well 
  Patents: 19
  Patent Applications: 0
• 306 Plural separate heating devices 
  Patents: 19
  Patent Applications: 0
• 307 Combined with nonelectric heating means (e.g., gas, etc.) 
  Patents: 65
  Patent Applications: 11
• 308 For heating liquid 
  Patents: 44
  Patent Applications: 13
• 309 Hot plate 
  Patents: 4
  Patent Applications: 2
• 310 Oven type 
  Patents: 7
  Patent Applications: 3
• 311 Fluid-in-circuit type heater 
  Patents: 27
  Patent Applications: 7
• 312 Method 
  Patents: 16
  Patent Applications: 6
• 313 Portable 
  Patents: 4
  Patent Applications: 1
• 314 Continuous flow of fluid being heated 
  Patents: 30
  Patent Applications: 7
• 315 With means to adjust current path between electrodes 
  Patents: 14
  Patent Applications: 0
• 316 Responsive to condition of fluid 
  Patents: 5
  Patent Applications: 0
• 317 Movable dielectric means 
  Patents: 3
  Patent Applications: 0
• 318 Current control means 
  Patents: 26
  Patent Applications: 2
• 319 With discharge member for line or tank 
  Patents: 0
  Patent Applications: 0
• 320 Tube or pipe forms flow path 
  Patents: 12
  Patent Applications: 2
• 321 Pipe forms at least one electrode 
  Patents: 11
  Patent Applications: 0
• 322 With reservoir or tank 
  Patents: 15
  Patent Applications: 5
• 323 With means to adjust current path between electrodes 
  Patents: 5
  Patent Applications: 1
• 324 Steam or vapor generator 
  Patents: 26
  Patent Applications: 10
• 325 Line connected boiler 
  Patents: 24
  Patent Applications: 3
• 326 Control of electrode immersion level 
  Patents: 14
  Patent Applications: 2
• 327 By electrode current 
  Patents: 22
  Patent Applications: 0
• 328 By pressure 
  Patents: 2
  Patent Applications: 0
• 329 With means to adjust current path between elctrodes 
  Patents: 6
  Patent Applications: 0
• 330 Movable dielectric means 
  Patents: 2
  Patent Applications: 0
• 331 Electrode arrangement 
  Patents: 22
  Patent Applications: 0
• 332 Water jet electrode 
  Patents: 17
  Patent Applications: 0
• 333 Manually filled tank or container 
  Patents: 10
  Patent Applications: 1
• 334 With means to adjust current path between electrodes 
  Patents: 7
  Patent Applications: 0
• 335 With supply interlock means 
  Patents: 12
  Patent Applications: 0
• 336 Separate electrode compartment 
  Patents: 9
  Patent Applications: 0
• 337 Electrode compartment removable from tank 
  Patents: 21
  Patent Applications: 3
• 338 Electrode details 
  Patents: 54
  Patent Applications: 5
• 339 With heat storage means 
  Patents: 29
  Patent Applications: 4
• 340 Method 
  Patents: 11
  Patent Applications: 2
• 341 For fluid heating (e.g., gas or liquid, etc.) 
  Patents: 43
  Patent Applications: 3
• 342 For vaporization 
  Patents: 24
  Patent Applications: 1
• 343 For subsequent heating by radiation 
  Patents: 14
  Patent Applications: 1
• 344 For subsequent heating by convection 
  Patents: 39
  Patent Applications: 0
• 345 Means to control heating accumulating medium 
  Patents: 21
  Patent Applications: 1
• 346 Heat accumulating medium details 
  Patents: 60
  Patent Applications: 3
• 347 Convection space heater 
  Patents: 61
  Patent Applications: 15
• 348 Artificial fire 
  Patents: 29
  Patent Applications: 13
• 349 Central heating type 
  Patents: 9
  Patent Applications: 5
• 350 With air delivery duct 
  Patents: 33
  Patent Applications: 5
• 351 Floor furnace type 
  Patents: 4
  Patent Applications: 1
• 352 Baseboard type 
  Patents: 24
  Patent Applications: 2
• 353 With baffle 
  Patents: 12
  Patent Applications: 2
• 354 With intermediate heat absorber 
  Patents: 12
  Patent Applications: 0
• 355 Heated by radiant source 
  Patents: 11
  Patent Applications: 2
• 356 With fan blower 
  Patents: 23
  Patent Applications: 2
• 357 With fluid heat absorber 
  Patents: 19
  Patent Applications: 2
• 358 By fan blower 
  Patents: 26
  Patent Applications: 2
• 359 Wall mounted 
  Patents: 2
  Patent Applications: 0
• 360 Forced air type 
  Patents: 141
  Patent Applications: 21
• 361 Heating attachment for fan 
  Patents: 18
  Patent Applications: 3
• 362 Fan with heated blades 
  Patents: 12
  Patent Applications: 3
• 363 Wall mounted 
  Patents: 32
  Patent Applications: 0
• 364 Ceiling mounted 
  Patents: 31
  Patent Applications: 2
• 365 Portable 
  Patents: 93
  Patent Applications: 11
• 366 With fan position adjusting means 
  Patents: 13
  Patent Applications: 0
• 367 Multi-direction air outlet 
  Patents: 36
  Patent Applications: 4
• 368 With baffle 
  Patents: 26
  Patent Applications: 2
• 369 Counterflow 
  Patents: 15
  Patent Applications: 0
• 370 Wall mounted 
  Patents: 23
  Patent Applications: 3
• 371 In wall cavity 
  Patents: 6
  Patent Applications: 1
• 372 Mounted in or on window or door 
  Patents: 5
  Patent Applications: 0
• 373 Portable 
  Patents: 48
  Patent Applications: 5
• 374 With baffle 
  Patents: 17
  Patent Applications: 1
• 375 Combined with radiation 
  Patents: 40
  Patent Applications: 3
• 376 With reflector 
  Patents: 44
  Patent Applications: 0
• 377 With heat exchange fluid 
  Patents: 14
  Patent Applications: 4
• 378 In plural sections 
  Patents: 16
  Patent Applications: 0
• 379 Concentrated heated air stream (i.e., blast) 
  Patents: 204
  Patent Applications: 19
• 380 For drying body part 
  Patents: 113
  Patent Applications: 16
• 381 Wall mounted 
  Patents: 50
  Patent Applications: 5
• 382 With support 
  Patents: 62
  Patent Applications: 3
• 383 Portable 
  Patents: 97
  Patent Applications: 8
• 384 With handle 
  Patents: 104
  Patent Applications: 10
• 385 Pistol-grip type 
  Patents: 188
  Patent Applications: 16
• 386 Vaporizer 
  Patents: 144
  Patent Applications: 43
• 387 Method 
  Patents: 39
  Patent Applications: 22
• 388 For metal vapor deposition 
  Patents: 70
  Patent Applications: 10
• 389 With crucible 
  Patents: 103
  Patent Applications: 10
• 390 With disposable evaporant cartridge or container 
  Patents: 233
  Patent Applications: 23
• 391 By radiant heat source 
  Patents: 42
  Patent Applications: 1
• 392 Wall mounted 
  Patents: 107
  Patent Applications: 13
• 393 By light bulb heat source 
  Patents: 26
  Patent Applications: 2
• 394 Liquid evaporant (e.g., water, etc.) 
  Patents: 145
  Patent Applications: 47
• 395 With wick 
  Patents: 188
  Patent Applications: 24
• 396 In continuous flow line connected heater 
  Patents: 93
  Patent Applications: 6
• 397 Pipe or tube forms flow path 
  Patents: 83
  Patent Applications: 6
• 398 With internal heating element 
  Patents: 44
  Patent Applications: 2
• 399 Flash chamber 
  Patents: 120
  Patent Applications: 8
• 400 In-line connected closed tank (i.e., pressurized) 
  Patents: 46
  Patent Applications: 8
• 401 With internal heating element 
  Patents: 90
  Patent Applications: 10
• 402 In-line connected open tank or container (i.e., nonpressurized) 
  Patents: 57
  Patent Applications: 10
• 403 Container with self-contained evaporant supply 
  Patents: 146
  Patent Applications: 18
• 404 Hand-held 
  Patents: 63
  Patent Applications: 8
• 405 With separate heating chamber 
  Patents: 109
  Patent Applications: 14
• 406 Removable 
  Patents: 41
  Patent Applications: 0
• 407 Radiant heater 
  Patents: 189
  Patent Applications: 75
• 408 With filter or diffuser for radiant energy 
  Patents: 51
  Patent Applications: 7
• 409 Hand-held 
  Patents: 21
  Patent Applications: 0
• 410 With air or gas circulation 
  Patents: 20
  Patent Applications: 1
• 411 Lamp banks (i.e., array of plural lamps) 
  Patents: 128
  Patent Applications: 42
• 412 Adjustable lamps position 
  Patents: 28
  Patent Applications: 1
• 413 Adjustable individual lamp position 
  Patents: 15
  Patent Applications: 2
• 414 Lamp banks form arch 
  Patents: 14
  Patent Applications: 1
• 415 Lamp banks movable relative to stationary work during use 
  Patents: 22
  Patent Applications: 1
• 416 With chamber 
  Patents: 707
  Patent Applications: 144
• 417 For heating moving strand, web or sheet 
  Patents: 65
  Patent Applications: 9
• 418 With support for workpiece 
  Patents: 512
  Patent Applications: 66
• 419 Focussed radiant beam 
  Patents: 47
  Patent Applications: 4
• 420 Plural reflectors 
  Patents: 37
  Patent Applications: 4
• 421 Elliptical or ellipsoidal reflector 
  Patents: 42
  Patent Applications: 0
• 422 With reflector 
  Patents: 142
  Patent Applications: 16
• 423 Elongated reflector 
  Patents: 54
  Patent Applications: 2
• 424 Heating element in transparent tubular envelope 
  Patents: 50
  Patent Applications: 1
• 425 With exposed radiant heating element 
  Patents: 10
  Patent Applications: 0
• 426 Bowl-shaped reflector 
  Patents: 31
  Patent Applications: 0
• 427 Annular heating element concentric with reflector axis 
  Patents: 10
  Patent Applications: 0
• 428 Linear heating element aligned with reflector axis 
  Patents: 8
  Patent Applications: 0
• 429 Coiled on core 
  Patents: 2
  Patent Applications: 0
• 430 Wall mounted 
  Patents: 8
  Patent Applications: 1
• 431 Collapsible or foldable reflector 
  Patents: 6
  Patent Applications: 0
• 432 Radiant extended surface type heater 
  Patents: 75
  Patent Applications: 6
• 433 With exposed radiant heating element 
  Patents: 16
  Patent Applications: 0
• 434 On ceramic support structure 
  Patents: 19
  Patent Applications: 0
• 435 With heat radiating panel 
  Patents: 146
  Patent Applications: 11
• 436 Wall or ceiling mounted 
  Patents: 32
  Patent Applications: 4
• 437 Plural panels 
  Patents: 24
  Patent Applications: 4
• 438 Heating element formed as coating on radiating panel surface 
  Patents: 16
  Patent Applications: 2
• 439 Nonmetallic panel 
  Patents: 26
  Patent Applications: 0
• 440 Multi-direction radiant heat output 
  Patents: 14
  Patent Applications: 1
• 441 Tank or container type liquid heater 
  Patents: 176
  Patent Applications: 69
• 442 Pour-in displacement discharge type tank 
  Patents: 40
  Patent Applications: 5
• 443 Flexible container (e.g., water bottle, etc.) 
  Patents: 18
  Patent Applications: 3
• 444 Portable container or tank 
  Patents: 91
  Patent Applications: 15
• 445 Plural compartments 
  Patents: 26
  Patent Applications: 0
• 446 With agitator 
  Patents: 7
  Patent Applications: 2
• 447 With internally positioned heating element 
  Patents: 88
  Patent Applications: 5
• 448 Removably inserted through fill opening 
  Patents: 32
  Patent Applications: 0
• 449 Line connected tank 
  Patents: 103
  Patent Applications: 22
• 450 Plural serially connected compartments 
  Patents: 41
  Patent Applications: 5
• 451 With immersion heating element 
  Patents: 172
  Patent Applications: 20
• 452 With baffle or guard 
  Patents: 28
  Patent Applications: 0
• 453 Removably insertable into tubular receptacle in tank 
  Patents: 26
  Patent Applications: 0
• 454 Plural heating zones 
  Patents: 60
  Patent Applications: 7
• 455 With heating element mounting arrangements 
  Patents: 64
  Patent Applications: 4
• 456 With heat exchange fluid 
  Patents: 36
  Patent Applications: 3
• 457 With protecting means against galvanic corrosion 
  Patents: 40
  Patent Applications: 1
• 458 With external heater 
  Patents: 35
  Patent Applications: 2
• 459 Clamped or secured to tank wall 
  Patents: 44
  Patent Applications: 6
• 460 Producing radiation 
  Patents: 4
  Patent Applications: 0
• 461 With externally mounted circulation-type heater 
  Patents: 17
  Patent Applications: 0
• 462 Laterally disposed (i.e., side-arm type) 
  Patents: 8
  Patent Applications: 0
• 463 With timer controlled energization 
  Patents: 50
  Patent Applications: 2
• 464 Off-peak power 
  Patents: 17
  Patent Applications: 1
• 465 Continuous flow type fluid heater 
  Patents: 145
  Patent Applications: 54
• 466 Method 
  Patents: 47
  Patent Applications: 20
• 467 With hot plate 
  Patents: 80
  Patent Applications: 2
• 468 Pipeline tracing 
  Patents: 65
  Patent Applications: 15
• 469 Skin effect heater type (e.g., S.E.C.T., etc.) 
  Patents: 52
  Patent Applications: 0
• 470 Disposable cartridge, tube or bag forms heated flow path (e.g., blood bag, etc.) 
  Patents: 98
  Patent Applications: 9
• 471 Combined liquid flow heater and pump unit 
  Patents: 112
  Patent Applications: 11
• 472 Flexibe (e.g., hose, etc.) 
  Patents: 67
  Patent Applications: 7
• 473 Fluid heater carried on discharge member 
  Patents: 81
  Patent Applications: 8
• 474 With flow control valve (e.g., faucet, etc.) 
  Patents: 17
  Patent Applications: 0
• 475 Valve turns heating element on and off 
  Patents: 9
  Patent Applications: 0
• 476 Hand-held discharge member 
  Patents: 29
  Patent Applications: 0
• 477 With storage container for fluid to be heated 
  Patents: 9
  Patent Applications: 0
• 478 Fluid conveying tube or pipe comprising resistive heating element 
  Patents: 111
  Patent Applications: 19
• 479 Externally heated line connected section 
  Patents: 105
  Patent Applications: 8
• 480 Pipe or tube forms flow path 
  Patents: 260
  Patent Applications: 20
• 481 Coiled 
  Patents: 58
  Patent Applications: 4
• 482 Plural pipes or tubes form flow path 
  Patents: 26
  Patent Applications: 3
• 483 Heating element producing radiation 
  Patents: 42
  Patent Applications: 0
• 484 Block forms flow path 
  Patents: 108
  Patent Applications: 4
• 485 Heated line section with heating element internal of flow path 
  Patents: 222
  Patent Applications: 38
• 486 Plural pipes or tubes form flow path 
  Patents: 35
  Patent Applications: 4
• 487 With jacket for heating element 
  Patents: 44
  Patent Applications: 3
• 488 Pipe or tube forms flow path 
  Patents: 112
  Patent Applications: 20
• 489 With jacket for heating element 
  Patents: 69
  Patent Applications: 3
• 490 Plural heated line sections (e.g., series or parallel, etc.) 
  Patents: 54
  Patent Applications: 7
• 491 With baffle-defined flow path 
  Patents: 53
  Patent Applications: 5
• 492 Producing counterflow circulation 
  Patents: 56
  Patent Applications: 2
• 493 Heating element integral with baffle 
  Patents: 16
  Patent Applications: 1
• 494 Block forms flow path 
  Patents: 36
  Patent Applications: 2
• 495 Plural different fluids simultaneously heated 
  Patents: 32
  Patent Applications: 0
• 496 With heat exchange fluid 
  Patents: 61
  Patent Applications: 12
• 497 Immersion heater details 
  Patents: 86
  Patent Applications: 10
• 498 With thermostatic control means 
  Patents: 140
  Patent Applications: 12
• 499 Buoyant in liquid 
  Patents: 14
  Patent Applications: 1
• 500 With plural heating elements 
  Patents: 35
  Patent Applications: 1
• 501 With particular mounting means 
  Patents: 107
  Patent Applications: 5
• 502 Having positive temperature coefficient 
  Patents: 79
  Patent Applications: 0
• 503 Particular sheath or jacket composition 
  Patents: 91
  Patent Applications: 2