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Current content: 156 511 693 patent documents

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200 241 new documents added

1 026 356 documents amended

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EP 0031049 B1 19840509 - ACOUSTIC TRANSDUCER

Title (en)

ACOUSTIC TRANSDUCER

Publication

EP 0031049 B1 19840509 (DE)

Application

EP 80107438 A 19801127

Priority

DE 2951075 A 19791219

Abstract (en)

[origin: US4430593A] Acoustic transducer having a piezo-electric element, including a lead section connected to the piezo-electric element, the lead section being in the form of a metallic body having a high specific attenuation.

IPC 1-7

G10K 11/02

IPC 8 full level

G01N 29/24 (2006.01); G01N 29/28 (2006.01); G10K 11/02 (2006.01); H04R 1/00 (2006.01); H04R 17/00 (2006.01)

CPC (source: EP US)

G10K 11/02 (2013.01 - EP US)

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI LU NL SE

DOCDB simple family (publication)

EP 0031049 A2 19810701; EP 0031049 A3 19810715; EP 0031049 B1 19840509; AT E7429 T1 19840515; DE 2951075 A1 19810702; DE 2951075 C2 19820415; DE 3067783 D1 19840614; JP H0167562 U 19890501; JP S5698651 A 19810808; US 4430593 A 19840207

DOCDB simple family (application)

EP 80107438 A 19801127; AT 80107438 T 19801127; DE 2951075 A 19791219; DE 3067783 T 19801127; JP 13171888 U 19881007; JP 18030280 A 19801218; US 21740880 A 19801217