Expired European patentEurope
Subliminal image modulation projection and detection system
EP 0562327 B1 · Applicant: SPARTANICS, LTD.
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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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.
Why it's free to use
- Filed March 4, 1993 and granted January 2, 1997. A European patent lasts at most 20 years from filing, so its term ended March 4, 2013.
- 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 September 4, 2018.
- 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.
FiledMarch 4, 1993
PublishedSeptember 29, 1993
GrantedJanuary 2, 1997
Term endedMarch 4, 2013
Application numberEP 93103488
Classification (CPC)F41G3/2638
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.