In August 2021 W3C launched the Second Screen Working Group Patent Advisory Group (PAG) in response to patent disclosures and exclusions by Apple, Inc (the "Disclosed Patents") claimed to bear relevance to the Open Screen Protocol specification. Apple excluded the claims from the W3C Royalty-Free License commitment of the W3C Patent Policy given by participants of the Second Screen Working Group.
W3C is issuing this call to inform the PAG's report. We seek prior art that is available in the public domain or on terms consistent with W3C's Royalty-Free Licensing Requirements.
The goal of the W3C Patent Policy is to assure that Recommendations produced under this policy can be implemented on a Royalty-Free (RF) basis. W3C forms Patent Advisory Groups (PAGs) when patent claims are asserted against or expressly excluded from royalty-free commitment for implementations of W3C Recommendations.
The Open Screen Protocol connects browsers to devices capable of rendering Web content for a shared audience. Typically, these are devices like Internet-connected TVs, HDMI dongles, and smart speakers. The spec is a suite of network protocols that allow user agents to implement the Presentation API and the Remote Playback API in an interoperable fashion.
For more information about the Second Screen Working Group PAG, see its home page and charter.
The PAG seeks information about prior art related to the patent disclosures and exclusions by Apple, Inc, where that prior art is available in the public domain or on terms consistent with W3C's Royalty-Free Licensing Requirements.
By making this call, neither the Second Screen Working Group PAG nor the W3C make nor imply any comment whatsoever on the relevance to the Open Screen Protocol or validity of claims related to the patents at hand.
Feedback should be directed to the PAG's public mailing-list: public-secondscreen-pag@w3.org (archives). Private feedback should be directed to the PAG chair: Wendy Seltzer (wseltzer@w3.org). In no event should patents be discussed in the technical Working Group.
Note on timing: While W3C welcomes information at any time, responses as soon as possible and ideally before 31 March 2022 are encouraged.