IPC 6 English version G01R 33/00-G01R 35/06

G01R03300-G01R03506

SECTION G– PHYSICS

G 01

MEASURING (counting G 06 M); TESTING

G 01 R

MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (measuring physical variables of any kind by conversion into electric variables, see Note (4) following the title of class G 01; measuring diffusion of ions in an electric field, e.g. electrophoresis, electro-osmosis, G 01 N; investigating non-electric or non-magnetic properties of materials by using electric or magnetic methods G 01 N; indicating correct tuning of resonant circuits H 03 J 3/12; monitoring electronic pulse counters H 03 K 21/40; monitoring operation of communication systems H 04)

33/

Arrangements or instruments for measuring magnetic variables

33/

Measuring direction or magnitude of magnetic fields or magnetic flux (G 01 R 33/20 takes precedence; measuring direction or magnitude of the earth's field for navigation or surveying G 01 C; for prospecting, for measuring the magnetic field of the earth G 01 V 3/00) [4]

Note

Group G 01 R 33/022 or group G 01 R 33/10 takes precedence over groups G 01 R 33/025 to G 01 R 33/095.

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/

using the flux-gate principle

33/

in thin-film element [3]

33/

using galvano-magnetic devices

33/

Hall-effect devices [6]

33/

095

Magneto-resistive devices [6]

33/

Plotting field distribution

33/

Measuring magnetic properties of articles or specimens of solids or fluids (involving magnetic resonance G 01 R 33/20) [4]

33/

Measuring or plotting hysteresis curves

33/

Measuring susceptibility

33/

Measuring magnetostrictive properties

33/

involving magnetic resonance (medical aspects A 61 B 5/055; magnetic resonance gyrometers G 01 C 19/60) [4,5]

33/

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

33/

using optical pumping [4]

33/

Details of apparatus provided for in groups G 01 R 33/44 to G 01 R 33/64 [5]

33/

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

33/

Temperature control thereof [6]

33/

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

33/

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 (G 01 R 33/343 takes precedence) [6]

33/

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

33/

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

Note

Groups G 01 R 33/385 to G 01 R 33/389 take precedence over groups G 01 R 33/381 to G 01 R 33/383. [6]

33/

381

using electromagnets (electromagnets per se H 01 F 7/06) [6]

33/

3815

with superconducting coils, e.g. power supply therefor (superconductive magnets H 01 F 6/00) [6]

33/

383

using permanent magnets (permanent magnets per se H 01 F 7/02) [6]

33/

385

using gradient magnetic field coils [6]

33/

387

Compensation of inhomogeneities (screening G 01 R 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/

(transferred to G 01 R 33/3875)

33/

Screening (screening in general H 05 K 9/00) [5,6]

33/

421

of main or gradient magnetic field [6]

33/

422

of the radiofrequency field [6]

33/

using nuclear magnetic resonance (NMR) (G 01 R 33/24, G 01 R 33/62 take precedence) [5]

33/

NMR spectroscopy [5]

33/

465

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

33/

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/

based on the determination of relaxation times [5]

33/

(transferred to G 01 R 33/485)

33/

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

33/

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/

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

33/

using electron paramagnetic resonance (G 01 R 33/24, G 01 R 33/62 take precedence) [5]

33/

using double resonance (G 01 R 33/24 takes precedence) [5]

33/

using cyclotron resonance (G 01 R 33/24 takes precedence) [5]

35/

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

35/

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

35/

of instruments for measuring time integral of power or current

35/

by stroboscopic methods

G01R 22/00 - G01R 31/44