| align = "center" bgcolor = "#99ccff"|4
| align = "center"|[http://www.wipo.int/ipcpub/#refresh=page¬ion=scheme&version=20110101&symbol=F03B F03B]
| Machines or engines for liquids ; wind, spring, or weight motors; producing mechanical power or a reactive propulsive thrust / '''Machines or engines for liquids'''
|-
|align = "center" bgcolor = "#99ccff"|5
|align = "center"|[http://www.wipo.int/ipcpub/#refresh=symbol¬ion=scheme&version=20110101&symbol=H02K H02K]
|Generation, conversion, or distribution of electric power / '''Dynamo-electric machines '''
|-
| align = "center" bgcolor = "#99ccff"|6
| align = "center"|[http://www.wipo.int/ipcpub/#&refresh=page¬ion=scheme&version=20110101&symbol=H02P H02P]
|Generation, conversion, or distribution of electric power / '''Control or regulation of electric motors, generators, or dynamo-electric converters; controlling transformers, reactors or choke coils '''
|-
| align = "center" bgcolor = "#99ccff"|7
| align = "center"|[http://www.wipo.int/ipcpub/#refresh=page¬ion=scheme&version=20110101&symbol=H02M H02M]
| Generation, conversion, or distribution of electric power / '''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 '''
|-
| align = "center" bgcolor = "#99ccff"|8
| align = "center"|[http://www.wipo.int/ipcpub/#refresh=page¬ion=scheme&version=20110101&symbol=H02J H02J]
| Generation, conversion, or distribution of electric power / '''Circuit arrangements or systems for supplying or distributing electric power; systems for storing electric energy '''
|-
| align = "center" bgcolor = "#99ccff"|9
| align = "center"|[http://www.wipo.int/ipcpub/#refresh=page¬ion=scheme&version=20110101&symbol=G06F G06F]
| Computing; calculating; counting /'''Electric digital data processing '''
|-
| align = "center" bgcolor = "#99ccff"|10
| align = "center"|[http://www.wipo.int/ipcpub/#refresh=page¬ion=scheme&version=20110101&symbol=G05F G05F]
| Controlling; regulating / '''Systems for regulating electric or magnetic variables '''
|-
| align = "center" bgcolor = "#99ccff"|11
| align = "center"|[http://www.wipo.int/ipcpub/#refresh=page¬ion=scheme&version=20110101&symbol=H02H H02H]
| Generation, conversion, or distribution of electric power / '''Emergency protective circuit arrangements '''
|}