Telescopic props (general means for fixing telescopic parts together )

Introduced: September 1968

Title

Titles differ between systems:

IPC: Telescopic props

CPC: Telescopic props (general means for fixing telescopic parts together )

Full titles differ between systems:

IPC:

Props; Chocks > Telescopic props

CPC:

Props (in the building art E04G25/00); Chocks > Telescopic props (general means for fixing telescopic parts together )

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

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E21D 15/15 Means counteracting entry of dirt; Built-in cleaning devices +1 CPC IPC+CPC Available in IPC and CPC
E21D 15/16 with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure IPC+CPC Available in IPC and CPC
E21D 15/28 with parts held relatively to each other by friction or gripping +1 CPC IPC+CPC Available in IPC and CPC
E21D 15/44 Hydraulic, pneumatic, or hydraulic-pneumatic props +1 CPC IPC+CPC Available in IPC and CPC
E21D 15/46 with load-measuring devices; with alarm devices +1 CPC IPC+CPC Available in IPC and CPC

Class E21,2013–2023, worldwide · Source: EPO PATSTAT

Class E21,2013–2023, worldwide · Source: EPO PATSTAT