As others have said there seems to only be a single Word document Microsoft have published on the "Windows Platform Binary Table". I then found the following MSDN Forums question (with posts between 2013-07-16 and 2013-07-18) about how to implement WPBT by someone with the username "kevinwu1980". A Google search for "kevinwu1980 lenovo" gave me this (the page is now a redirect). If that MSDN Forums post is by the same guy then Lenovo was likely working on this in mid-2013:
> Kernel Service Protection for Client Security
> doi.ieeecomputersociety.org/10.1109/MSP.2010.112
> by HJK Wu - 2010
> ... for Client Security. Hui Jun (Kevin) Wu , Lenovo Global Desktop Development Laboratory ..... Contact him at kevinwu1980@gmail.com or wuhj@lenovo.com.
https://social.msdn.microsoft.com/Forums/windowsdesktop/en-U...