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Current content: 157 337 350 patent documents

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219 431 new documents added

1 247 852 documents amended

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EP 0303143 A3 19901128 - HEARING AID

Title (en)

HEARING AID

Publication

EP 0303143 A3 19901128 (DE)

Application

EP 88112469 A 19880801

Priority

CH 306787 A 19870811

Abstract (en)

[origin: US4890330A] A hearing aid has a housing to which a standard battery compartment can be removably attached, or to which an audio connection, including a battery compartment, can be optionally removably attached in place of the standard battery compartment. The necessity of an external audio connection, which adds to the size of the hearing aid, is thus eliminated.

IPC 1-7

H04R 25/02

IPC 8 full level

H04R 25/02 (2006.01)

CPC (source: EP US)

H04R 25/556 (2013.01 - EP US); H01H 2300/004 (2013.01 - EP US); H04R 2225/021 (2013.01 - EP US)

Citation (search report)

[A] EP 0087668 A1 19830907 - SIEMENS AG [DE]
[A] US 3138491 A 19640623 - RUBIO ALFRED M, et al
[E] DE 3723809 A1 19890126 - BOSCH GMBH ROBERT [DE]

Designated contracting state (EPC)

DE ES FR GB IT NL

DOCDB simple family (publication)

EP 0303143 A2 19890215; EP 0303143 A3 19901128; CH 673919 A5 19900412; US 4890330 A 19891226

DOCDB simple family (application)

EP 88112469 A 19880801; CH 306787 A 19870811; US 22729188 A 19880802