The patent was granted after 12 years: 6 years of examination and 6 years of opposition procedures. Opposition was filed by Interessengemeinschaft f. Rundfunkschutzrechte GmbH Schutzverwertung & Co KG, an association of broadcasting companies who are struggling to keep their field free from patents. One may wonder how it was possible to uphold the broad claims in view of the opposition.
2003-05-15 REG Reference to a national code (CHPL) (CH )
2002-01-01 REG Reference to a national code (GBIF02) (GB )
2000-08-04 REG Reference to a national code (FRTP) (FR )
2000-06-07 REG Reference to a national code (GB732E) (GB )
2000-05-31 REG Reference to a national code (PTPC4A20000216 WERNER HENZE DE) (PT )
1999-12-31 REG Reference to a national code (CHPUE BLAUPUNKT-WERKE GMBH -DANN AN- WERNER HENZE) (CH )
1999-04-07 RIN2 Inventor (correction) (HENZE, WERNER)
1999-04-07 RAP2 Patent owner reassignment (correction) (HENZE, WERNER)
1998-01-21 26(-) Opposition filed (971126 INTERESSENGEMEINSCHAFT FUER RUNDFUNKSCHUTZRECHTE GMBH SCHUTZRECHTSVERWERTUNG & CO. KG)
1997-05-28 GBT(+) Gb: translation of ep patent filed (gb section 77(6)(a)/1977) (970501)
1997-04-18 ET(+) Fr: translation filed
1997-04-03 REF Corresponds to: (DE 59208064 P)
1997-02-28 REG Reference to a national code (CHEP) (CH )
1997-02-28 REG Reference to a national code (CHNV SCINTILLA AG, DIREKTION) (CH )
1997-02-26 B1(+) Patent specification
1997-02-26 REF Corresponds to: (AT 149272 R)
1997-02-26 AK(+) Designated contracting states: (AT CH DE FR GB LI PT AT CH DE FR GB LI PT) ( B1)
1996-01-31 17Q(+) First examination report (951215)
1993-10-13 17P(+) Request for examination filed (930812)
1993-03-24 AK(+) Designated contracting states: (AT CH DE FR GB LI PT) ( A1)
1993-03-24 A1(+) Publication of application with search report
1992-09-15 AE Ep-application (EP 1992 92115726 A)
1991-09-18 AA Priority (DE 1991 4131052 A)