| H01B |
Cables; conductors; insulators; selection of materials for their conductive, insulating or dielectric properties |
| H01C |
Resistors |
| H01F |
Magnets; inductances; transformers; selection of materials for their magnetic properties |
| H01G |
Capacitors; capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices of the electrolytic type |
| H01H |
Electric switches; relays; selectors; emergency protective devices |
| H01J |
Electric discharge tubes or discharge lamps |
| H01K |
Electric incandescent lamps |
| H01L |
Semiconductor devices not covered by class |
| H01M |
Processes or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy |
| H01P |
Waveguides; resonators, lines or other devices of the waveguide type |
| H01Q |
Antennas, i.e. radio aerials |
| H01R |
Electrically-conductive connections; structural associations of a plurality of mutually-insulated electrical connecting elements; coupling devices; current collectors |
| H01S |
Devices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light; devices using stimulated emission of electromagnetic radiation in wave ranges other than optical |
| H01T |
Spark gaps; overvoltage arresters using spark gaps; sparking plugs; corona devices; generating ions to be introduced into non-enclosed gases |
| H02B |
Boards, substations or switching arrangements for the supply or distribution of electric power |
| H02G |
Installation of electric cables or lines, or of combined optical and electric cables or lines |
| H02H |
Emergency protective circuit arrangements |
| H02J |
Circuit arrangements or systems for supplying or distributing electric power; systems for storing electric energy |
| H02K |
Dynamo-electric machines |
| H02M |
Apparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems; conversion of dc or ac input power into surge output power; control or regulation thereof |
| H02N |
Electric machines not otherwise provided for |
| H02P |
Control or regulation of electric motors, electric generators or dynamo-electric converters; controlling transformers, reactors or choke coils |
| H02S |
Generation of electric power by conversion of infrared radiation, visible light or ultraviolet light, e.g. using photovoltaic [pv] modules |
| H03B |
Generation of oscillations, directly or by frequency-changing, by circuits employing active elements which operate in a non-switching manner; generation of noise by such circuits |
| H03C |
Modulation |
| H03D |
Demodulation or transference of modulation from one carrier to another |
| H03F |
Amplifiers |
| H03G |
Control of amplification |
| H03H |
Impedance networks, e.g. resonant circuits; resonators |
| H03J |
Tuning resonant circuits; selecting resonant circuits |
| H03K |
Pulse technique |
| H03L |
Automatic control, starting, synchronisation, or stabilisation of generators of electronic oscillations or pulses |
| H03M |
Coding, decoding or code conversion, in general |
| H04B |
Transmission |
| H04H |
Broadcast communication |
| H04J |
Multiplex communication |
| H04K |
Secret communication; jamming of communication |
| H04L |
Transmission of digital information, e.g. telegraphic communication |
| H04M |
Telephonic communication |
| H04N |
Pictorial communication, e.g. television |
| H04Q |
Selecting |
| H04R |
Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public address systems |
| H04S |
Stereophonic systems |
| H04W |
Wireless communication networks |
| H05B |
Electric heating; electric light sources not otherwise provided for; circuit arrangements for electric light sources, in general |
| H05C |
Electric circuits or apparatus specially designed for use in equipment for killing, stunning, enclosing or guiding living beings |
| H05F |
Static electricity; naturally-occurring electricity |
| H05G |
X-ray technique |
| H05H |
Plasma technique; production of accelerated electrically- charged particles or of neutrons; production or acceleration of neutral molecular or atomic beams |
| H05K |
Printed circuits; casings or constructional details of electric apparatus; manufacture of assemblages of electrical components |
| H10B |
Electronic memory devices |
| H10K |
Organic electric solid-state devices |
| H10N |
Electric solid-state devices not otherwise provided for |
| H99Z |
Subject matter not otherwise provided for in this section |
