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IPC 7
  G01R 22/00 - G01R 31/44  
G01R03300-G01R03506
 

SECTION G – PHYSICS


G 01MEASURING (counting G06M); TESTING


G 01 RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (measuring physical variables of any kind by conversion into electric variables, see Note (4) following the title of class G01; measuring diffusion of ions in an electric field, e.g. electrophoresis, electro-osmosis, G01N; investigating non-electric or non-magnetic properties of materials by using electric or magnetic methods G01N; indicating correct tuning of resonant circuits H03J 3/12; monitoring electronic pulse counters H03K 21/40; monitoring operation of communication systems H04)


33/

00Arrangements or instruments for measuring magnetic variables

33/

02.Measuring direction or magnitude of magnetic fields or magnetic flux (G01R 33/20 takes precedence; measuring direction or magnitude of the earth's field for navigation or surveying G01C; for prospecting, for measuring the magnetic field of the earth G01V 3/00)  [4]

Note

 Group G01R 33/022 or group G01R 33/10 takes precedence over groups G01R 33/025 to G01R 33/09.

33/

022..Measuring gradient  [3]

33/

025..Compensating stray fields  [3]

33/

028..Electrodynamic magnetometers  [3]

33/

032..using magneto-optic devices, e.g. Faraday  [3]

33/

035..using superconductive devices  [3]

33/

038..using permanent magnets, e.g. balances, torsion devices  [3]

33/

04..using the flux-gate principle

33/

05...in thin-film element  [3]

33/

06..using galvano-magnetic devices

33/

07...Hall-effect devices  [6]

33/

09...Magneto-resistive devices  [6]

33/

10..Plotting field distribution

33/

12.Measuring magnetic properties of articles or specimens of solids or fluids (involving magnetic resonance G01R 33/20)  [4]

33/

14..Measuring or plotting hysteresis curves

33/

16..Measuring susceptibility

33/

18..Measuring magnetostrictive properties

33/

20.involving magnetic resonance (medical aspects A61B 5/055; magnetic resonance gyrometers G01C 19/60)  [4,5]

33/

24..for measuring direction or magnitude of magnetic fields or magnetic flux  [4]

33/

26...using optical pumping  [4]

33/

28..Details of apparatus provided for in groups G01R 33/44 to G01R 33/64  [5]

33/

30...Sample handling arrangements, e.g. sample cells, spinning mechanisms  [5]

33/

31....Temperature control thereof  [6]

33/

32...Excitation or detection systems, e.g. using radiofrequency signals  [5]

33/

34....Constructional details, e.g. resonators  [5]

33/

341.....comprising surface coils  [6]

33/

3415......comprising arrays of sub-coils  [6]

33/

343.....of slotted-tube or loop-gap type  [6]

33/

345.....of waveguide type (G01R 33/343 takes precedence)  [6]

33/

36....Electrical details, e.g. matching or coupling of the coil to the receiver  [5]

33/

38...Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field  [5]

Note

 Groups G01R 33/385 to G01R 33/389 take precedence over groups G01R 33/381 to G01R 33/383.  [6]

33/

381....using electromagnets (electromagnets per se H01F 7/06)  [6]

33/

3815.....with superconducting coils, e.g. power supply therefor (superconductive magnets H01F 6/00)  [6]

33/

383....using permanent magnets (permanent magnets per se H01F 7/02)  [6]

33/

385....using gradient magnetic field coils  [6]

33/

387....Compensation of inhomogeneities (screening G01R 33/42)  [6]

33/

3873.....using ferromagnetic bodies  [6]

33/

3875.....using correction coil assemblies, e.g. active shimming  [6]

33/

389....Field stabilisation  [6]

33/

42...Screening (screening in general H05K 9/00)  [5,6]

33/

421....of main or gradient magnetic field  [6]

33/

422....of the radiofrequency field  [6]

33/

44..using nuclear magnetic resonance (NMR) (G01R 33/24, G01R 33/62 take precedence)  [5]

33/

46...NMR spectroscopy  [5]

33/

465....applied to biological material, e.g. in vitro testing  [6]

33/

48...NMR imaging systems  [5]

33/

483....with selection of signal or spectra from particular regions of the volume, e.g. in vivo spectroscopy  [6]

33/

485.....based on chemical shift information  [6]

33/

50....based on the determination of relaxation times  [5]

33/

54....Signal processing systems, e.g. using pulse sequences  [5]

33/

56.....Image enhancement or correction, e.g. subtraction or averaging techniques  [5]

33/

561......by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences  [6]

33/

563......of moving material, e.g. flow-contrast angiography  [6]

33/

565......Correction of image distortions, e.g. due to magnetic field inhomogeneities  [6]

33/

567......gated by physiological signals  [6]

33/

58....Calibration of imaging systems, e.g. using test probes  [5]

33/

60..using electron paramagnetic resonance (G01R 33/24, G01R 33/62 take precedence)  [5]

33/

62..using double resonance (G01R 33/24 takes precedence)  [5]

33/

64..using cyclotron resonance (G01R 33/24 takes precedence)  [5]


35/

00Testing or calibrating of apparatus covered by the preceding groups  [2]

35/

02.of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating

35/

04.of instruments for measuring time integral of power or current

35/

06..by stroboscopic methods


  G01R 22/00 - G01R 31/44   
 

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