Expired European patentEurope
Digital phase locked loop
EP 0185779 B1 · Applicant: International Business Machines Corporation
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
Read the whole patent
Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed December 21, 1984 and granted February 28, 1990. A European patent lasts at most 20 years from filing, so its term ended December 21, 2004.
- A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by June 21, 2010.
- We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledDecember 21, 1984
PublishedJuly 2, 1986
GrantedFebruary 28, 1990
Term endedDecember 21, 2004
Application numberEP 84115639
Classification (CPC)H04L7/0338 +1 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.