EP1538868A3

Audio amplification apparatus

Abstract

A method of adjusting frequency-dependent amplification in an audio amplification apparatus. The audio amplification apparatus includes a forward transfer path (2) connectable to an output transducer, the forward transfer path including a frequency transposing element. The method includes the steps of: presenting stimuli to the output transducer at a plurality of frequencies; adjusting the stimulus level (C) at each frequency to meet a predefined loudness perception level or detection threshold of the listener; deriving an equal loudness contour of output transducer levels from the adjusted stimuli levels; and deriving the frequency-dependent amplification of levels of input signals (I) at each frequency

Term

Term ended

Projected expiry passed 5 March 2025, 1.6 years ago.

Every citation, both waysCites: the store holds 2 of 3

Citations
Document	Relation	Office	Category	Cited during	Relevant claims
US4471171A	Cites	United States of America	A	Search report	1-14,24,25
US6201875B1	Cites	United States of America	Y	Search report	1-14,24,25

18 members in 4 offices

This recordMember, by publication datePriority claim

Priority claims4

Priority claims
Document	Office	Kind	Date
2004201374	Australia	A	2004-04-01
2004201374	Australia	–	2004-04-01
2004201374	–	–	–
AU20040201374	–	–	–

Members18

Family members, oldest first
Document	Office	Kind
EP1480494A2	European Patent Office (EPO)	A2	2004-11-24
AU2003236382A1	Australia	A1	2005-03-10
US2005094827A1	United States of America	A1	2005-05-05
EP1538868A2	European Patent Office (EPO)	A2	2005-06-08
US2005226427A1	United States of America	A1	2005-10-13
AU2004201374A1	Australia	A1	2005-10-20
EP1480494A3	European Patent Office (EPO)	A3	2006-04-26
EP1538868A3This record	European Patent Office (EPO)	A3	2006-09-13
EP1480494B1	European Patent Office (EPO)	B1	2008-07-30
DE602004015365D1	Germany	D1	2008-09-11
US7756276B2	United States of America	B2	2010-07-13
US7778426B2	United States of America	B2	2010-08-17
US2010278356A1	United States of America	A1	2010-11-04
EP2249582A1	European Patent Office (EPO)	A1	2010-11-10
AU2004201374B2	Australia	B2	2010-12-23
AU2003236382B2	Australia	B2	2011-02-24
US8351626B2	United States of America	B2	2013-01-08
EP1538868B1	European Patent Office (EPO)	B1	2013-09-18

44 legal events, as 4 offices reported them to INPADOC

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Events

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	Event	Code	Office
2019-05-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2019-02-28	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2019-02-28	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2019-01-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2018-10-31	Patent ceasedCeasedPL	PL	CH
2018-10-29	Ep patent lapsedLapsedEBP	EBP	DK
2018-10-02	Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal feeWithdrawnR119	R119	DE
2017-07-31	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2017-05-31	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2017-04-28	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2017-01-04	Opposition rejectedOpposition27O	27O	EP
2016-12-02	Opposition rejectedOppositionORIGINAL CODE: 0009273PLBN	PLBN	EP
2016-12-02	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: OPPOSITION REJECTEDSTAA	STAA	EP
2016-08-04	Epo decision maintaining patent unamended now finalR100	R100	DE
2016-07-24	Communication despatched that opposition was rejectedOppositionORIGINAL CODE: EPIDOSNREJ1PLCK	PLCK	EP
2016-02-10	Opposition filed (corrected)OppositionR26	R26	EP
2016-01-08	Opposition data, opponent's data or that of the opponent's representative modifiedOppositionORIGINAL CODE: 0009299OPPOPLAB	PLAB	EP
2015-09-16	Party data changed (patent owner data changed or rights of a patent transferred)RAP2	RAP2	EP
2015-07-29	Opposition filed (corrected)OppositionR26	R26	EP
2015-06-26	Opposition data, opponent's data or that of the opponent's representative modifiedOppositionORIGINAL CODE: 0009299OPPOPLAB	PLAB	EP
2015-01-24	Reply of patent proprietor to notice(s) of opposition receivedOppositionORIGINAL CODE: EPIDOSNOBS3PLBB	PLBB	EP
2014-11-26	Information modified related to communication of a notice of opposition and request to file observations + time limitOppositionORIGINAL CODE: EPIDOSCOBS2PLAF	PLAF	EP
2014-09-04	Opposition filed against patentOppositionR026	R026	DE
2014-07-30	Opposition filedOpposition26	26	EP
2014-07-25	Notice of opposition and request to file observation + time limit sentOppositionORIGINAL CODE: EPIDOSNOBS2PLAX	PLAX	EP
2014-06-27	Opposition filedOppositionORIGINAL CODE: 0009260PLBI	PLBI	EP
2013-11-14	Dpma publication of mentioned ep patent grantGrantedR096	R096	DE
2013-10-28	Ep patent with danish claimsT3	T3	DK
2013-10-28	Ep patent with danish claimsT3	T3	DK
2013-09-30	European patent takes effect as a national patent in ch/liEP	EP	CH
2013-09-18	Designated contracting statesAK	AK	EP
2013-08-16	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA	EP
2013-08-09	Grant fee paidORIGINAL CODE: EPIDOSNIGR3GRAS	GRAS	EP
2013-05-29	Intention to grant announcedINTG	INTG	EP
2013-05-06	Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOSNIGR1GRAP	GRAP	EP
2007-05-16	Designation fees paidAKX	AKX	EP
2007-05-09	First examination report despatched17Q	17Q	EP
2007-04-11	Request for examination filed17P	17P	EP
2006-09-13	Designated contracting statesAK	AK	EP
2006-09-13	Request for extension of the european patentAX	AX	EP
2006-08-11	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
2005-06-08	Designated contracting statesAK	AK	EP
2005-06-08	Request for extension of the european patentAX	AX	EP
2005-04-22	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP

Audio amplification apparatus

Abstract

Term

Priority claims4

Members18

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Titles3

Classification

Designated states36