DIFF Subgroup
H01K 1/52 Means for obtaining or maintaining the desired pressure within the vessel
Introduced: September 1968
Full Title
Details > Means for obtaining or maintaining the desired pressure within the vessel
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H01K 1/54 Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering IPC+CPC Available in IPC and CPC