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PCE
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DIFF Subgroup
H01P 1/18

Phase-shifters (H01P1/165 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Phase-shifters

CPC: Phase-shifters (H01P1/165 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Auxiliary devices > Phase-shifters

CPC:

Auxiliary devices (coupling devices of the waveguide type H01P5/00) > Phase-shifters (H01P1/165 takes precedence)

CPC subdivides this area 3x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

IPC defines codes here since 1980.

Child Classifications

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  • H01P 1/181 CPC only CPC only
  • H01P 1/182 CPC only CPC only
  • H01P 1/183 CPC only CPC only
  • H01P 1/184 CPC only CPC only
  • H01P 1/185 using a diode or a gas filled discharge tube since 1980 IPC+CPC Available in IPC and CPC