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Expired European patentEurope

Improved bang-bang controlled velocity command generator

EP 0103493 B1 · Applicant: AMPEX CORPORATION

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Overview

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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.

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Why it's free to use

  • Filed September 15, 1983 and granted December 16, 1987. A European patent lasts at most 20 years from filing, so its term ended September 15, 2003.
  • 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 15, 2009.
  • 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 15, 1983
PublishedMarch 21, 1984
GrantedDecember 16, 1987
Term endedSeptember 15, 2003
Application numberEP 83305403
Classification (CPC)G11B5/5552 +1 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedSep 15, 1983PublishedMarch 21, 1984Patent grantedDec 16, 1987Term endedSep 15, 2003

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

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