GPI coverage and content

You can use Global Patent Index (GPI) to carry out detailed searches in the EPO's worldwide bibliographic (DOCDB), legal event (INPADOC) and full-text data sets, and download or visualise the search results for statistical analysis.

Current content: 159 515 718 patent documents

This week's update (01/11/2024 12:00 CET):

154 531 new documents added

1 078 520 documents amended

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EP 0377143 A3 19910731 - LOUDSPEAKER VOICE COIL

Title (en)

LOUDSPEAKER VOICE COIL

Publication

EP 0377143 A3 19910731 (DE)

Application

EP 89122992 A 19891213

Priority

DE 3900038 A 19890103

Abstract (en)

[origin: EP0377143A2] The voice coil (1) is wound of conductive foil instead of of wires, which results in considerable weight saving. <IMAGE>

IPC 1-7

H04R 9/04

IPC 8 full level

H04R 9/04 (2006.01)

CPC (source: EP)

H04R 9/041 (2013.01)

Citation (search report)

[X] US 3711659 A 19730116 - BREMSETH G
[A] FR 732653 A 19320923 - KOLSTER BRANDES LTD
[A] US 2445276 A 19480713 - FRANK MASSA
[E] DE 3830082 A1 19900315 - ELECTRONIC WERKE DEUTSCHLAND [DE], et al

Designated contracting state (EPC)

AT BE DE ES FR GB GR IT NL

DOCDB simple family (publication)

EP 0377143 A2 19900711; EP 0377143 A3 19910731; DE 3900038 A1 19900705

DOCDB simple family (application)

EP 89122992 A 19891213; DE 3900038 A 19890103