characterised by features of the electrodes or insulation

Introduced: September 1968

Full Title

Sparking plugs > characterised by features of the electrodes or insulation

IPC and CPC are identically structured here. All 8 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

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H01T 13/22 having two or more electrodes embedded in insulation (sparking plugs having two or more spark gaps H01T13/46) IPC+CPC Available in IPC and CPC
H01T 13/24 having movable electrodes (H01T13/28 takes precedence) IPC+CPC Available in IPC and CPC
H01T 13/28 having spherically shaped electrodes, e.g. ball-shaped IPC+CPC Available in IPC and CPC
H01T 13/32 characterised by features of the earthed electrode IPC+CPC Available in IPC and CPC
H01T 13/34 characterised by the mounting of electrodes in insulation, e.g. by embedding IPC+CPC Available in IPC and CPC
H01T 13/36 characterised by the joint between insulation and body, e.g. using cement IPC+CPC Available in IPC and CPC
H01T 13/38 Selection of materials for insulation IPC+CPC Available in IPC and CPC
H01T 13/39 Selection of materials for electrodes since 1985 IPC+CPC Available in IPC and CPC

Class H01,2013–2023, worldwide · Source: EPO PATSTAT

Class H01,2013–2023, worldwide · Source: EPO PATSTAT