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Expired European patentEurope

Apparatus and method for a smooth transition between calibrated airspeed control of an aircraft and mach number control of an aircraft

EP 0444541 B1 · Applicant: HONEYWELL INC.

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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 February 22, 1991 and granted August 2, 1995. A European patent lasts at most 20 years from filing, so its term ended February 22, 2011.
  • 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 August 22, 2016.
  • 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.
FiledFebruary 22, 1991
PublishedSeptember 4, 1991
GrantedAugust 2, 1995
Term endedFebruary 22, 2011
Application numberEP 91102592
Classification (CPC)G05D1/0607

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedFeb 22, 1991PublishedSep 4, 1991Patent grantedAug 2, 1995Term endedFeb 22, 2011

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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