EP 0564874 A1 19931013 - Two-way communications earset with filter.
Title (en)
Two-way communications earset with filter.
Title (de)
Zweiweg-Kommunikations-Ohrhörer mit Filter.
Title (fr)
Casque combiné à deux directions avec filtre.
Publication
Application
Priority
- CA 2094667 A 19930422
- JP 9245792 A 19920319
Abstract (en)
A two way voice communications earset (1) which is situated in the ear of the user and which includes a filter (6) in an audio signal loop coupling a microphone (5) and a speaker (3) of the earset. <IMAGE>
IPC 1-7
IPC 8 full level
H04B 1/00 (2006.01); H04M 1/05 (2006.01); H04R 1/00 (2006.01); H04R 1/10 (2006.01); H04R 3/00 (2006.01); H04R 3/02 (2006.01)
CPC (source: EP)
H04R 1/1016 (2013.01); H04R 3/02 (2013.01)
Citation (search report)
- [A] DE 3627002 A1 19880218 - PHILIPS PATENTVERWALTUNG [DE]
- [A] GB 1530814 A 19781101 - BRITISH AIRCRAFT CORP LTD
- [A] EP 0237454 A1 19870916 - CENTRE NAT RECH SCIENT [FR]
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0564874 A1 19931013; EP 0564874 B1 19970917; CA 2094667 A1 19941023; DE 69313902 D1 19971023; DE 69313902 T2 19980122; ES 2108151 T3 19971216; JP H05268310 A 19931015; JP H0817415 B2 19960221
DOCDB simple family (application)
EP 93104560 A 19930319; CA 2094667 A 19930422; DE 69313902 T 19930319; ES 93104560 T 19930319; JP 9245792 A 19920319