Second window may refer to:

  • broadcast syndication rights for a work following the expiration of first window rights for that work
  • the inter-partes review period for third-party challenge and opposition of a granted patent or trademark
  • a wavelength band or transmission window in fibre-optic communications
  • the period of ischemic preconditioning, starting 24 hours after a coronary occlusion and lasting up to 72 hours, that can limit injuries of a subsequent ischaemia reperfusion in the myocardium

See also

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