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H04M 3/20

Automatic or semi-automatic exchanges with means for interrupting existing connections; with means for breaking-in on conversations

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Edits on 16 Mar, 2022

"update inverses"

edited on 16 Mar, 2022

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Infobox

Child classification

"Entity importer update"

edited on 16 Mar, 2022

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Parent classification

Edits on 5 Mar, 2022

"Created via: Entity Importer"

created this topic on 5 Mar, 2022

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Description (+131 characters)

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H04M 3/20

Automatic or semi-automatic exchanges with means for interrupting existing connections; with means for breaking-in on conversations

Infobox

Is a

Patent classification

Classification Type

Cooperative Patent Classification

Website

http://data.epo.org/linked-data/def/cpc/H04M3-20

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