Patent Yard Sign in
Expired European patentEurope

Sound field simulation system and method for calibrating same

EP 0075615 B1 · Applicant: Han, Hok Lioe

EPO PDF

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed September 24, 1981 and granted September 17, 1986. A European patent lasts at most 20 years from filing, so its term ended September 24, 2001.
  • 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 March 24, 2007.
  • 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.
FiledSeptember 24, 1981
PublishedApril 6, 1983
GrantedSeptember 17, 1986
Term endedSeptember 24, 2001
Application numberEP 81201065
Classification (CPC)H04R29/00 +2 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedSep 24, 1981PublishedApril 6, 1983Patent grantedSep 17, 1986Term endedSep 24, 2001

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.