| Class Number |
Class Name |
Patents |
| 324/158.1 |
Miscellaneous |
3,073 |
| 324/160 |
Electrical speed measuring |
265 |
| 324/200 |
Magnetic |
99 |
| 324/300 |
Particle precession resonance |
631 |
| 324/323 |
Of geophysical surface or subsurface in situ |
185 |
| 324/376 |
Of subsurface core sample |
57 |
| 324/378 |
Internal-combustion engine ignition system or device |
113 |
| 324/403 |
Electric lamp or discharge device |
37 |
| 324/415 |
Electromechanical switching device |
145 |
| 324/425 |
Electrolyte properties |
237 |
| 324/451 |
A material property using thermoelectric phenomenon |
29 |
| 324/452 |
A material property using electrostatic phenomenon |
155 |
| 324/457 |
Electrostatic field |
310 |
| 324/459 |
Using ionization effects |
106 |
| 324/500 |
Fault detecting in electric circuits and of electric components |
381 |
| 324/557 |
For insulation fault of noncircuit elements |
175 |
| 324/600 |
Impedance, admittance or other quantities representative of electrical stimulus/response relationships |
158 |
| 324/66 |
Conductor identification or location (e.g., phase identification) |
292 |
| 324/71.1 |
Determining nonelectric properties by measuring electric properties |
677 |
| 324/72 |
Testing potential in specific environment (e.g., lightning stroke) |
441 |
| 324/73.1 |
Plural, automatically sequential tests |
1,070 |
| 324/74 |
Testing and calibrating electric meters (e.g., watt-hour meters) |
197 |
| 324/76.11 |
Measuring, testing, or sensing electricity, per se |
501 |
| 324/800 |
Divining rods |
1 |
