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![[Search a list of Patent Appplications for class 324]](../as.gif) Class 324 | ELECTRICITY: MEASURING AND TESTING |
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![[List of Patents for class 324 subclass 300]](../ps.gif) | 300 | PARTICLE PRECESSION RESONANCE |
| | 301 |  Using a magnetometer |
| | 303 | Using well logging device |
| | 304 | Using optical pumping or sensing device |
| | 306 | Determine fluid flow rate |
| | 307 | Using a nuclear resonance spectrometer system |
| | 308 |  Including a test sample and control sample |
| | 309 | To obtain localized resonance within a sample |
| | 310 | By scanning sample frequency spectrum |
| | 311 | With signal decoupling |
| | 312 | By spectrum storage and analysis |
| | 313 | Including polarizing magnetic field/radio frequency tuning |
| | 314 | With conditioning of transmitter signal |
| | 315 | With sample resonant frequency and temperature interdependence |
| | 316 | Using an electron resonance spectrometer system |
| | 318 | Spectrometer components |
| | 323 | OF GEOPHYSICAL SURFACE OR SUBSURFACE IN SITU |
| | 324 | Including borehole fluid investigation |
| | 326 | For small object detection or location |
| | 330 | By aerial survey |
| | 332 | With radiant energy or nonconductive-type transmitter |
| | 344 | With radiant energy or nonconductive-type receiver |
| | 345 | By magnetic means |
| | 347 | Using electrode arrays, circuits, structure, or supports |
| | 348 | For detecting naturally occurring fields, currents, or potentials |
| | 354 | Coupled to artificial current source |
| | 376 | OF SUBSURFACE CORE SAMPLE |
| | 378 | INTERNAL-COMBUSTION ENGINE IGNITION SYSTEM OR DEVICE |
| | 379 | With analysis of displayed waveform |
| | 380 | Electronic ignition system |
| | 383 | By simulating or substituting for a component under test |
| | 384 | Using plural tests in a conventional ignition system |
| | 385 | Distributor |
| | 388 | Coil |
| | 389 | Magneto |
| | 390 | Low or high tension lead |
| | 391 | Ignition timing |
| | 393 | In situ testing of spark plug |
| | 394 | With cathode-ray tube display |
| | 395 | Using an illuminating device to indicate spark plug condition |
| | 396 | With an air gap in series with spark plug to indicate spark plug condition |
| | 397 | By shorting the plug to ground to indicate spark plug condition |
| | 399 | Wherein a measured electric quantity indicates spark plug condition |
| | 400 | Spark plug removed or tested in a test fixture |
| | 402 | Apparatus for coupling a measuring instrument to an ignition system |
| | 403 | ELECTRIC LAMP OR DISCHARGE DEVICE |
