When running hidtransport.DiscoverLocalHIDU2FDevices() on Windows, HID devices returned seem to be missing HID attributes such as PID and VID. Tracing through the code it appears that FillDeviceAttributes needs to added to WindowsHidDevice init function.
class WindowsHidDevice(base.HidDevice): ... def __init__(self, path): """See base class.""" base.HidDevice.__init__(self, path) self.dev = OpenDevice(path) self.desc = base.DeviceDescriptor() FillDeviceAttributes(self.dev, self.desc) #added function call to copy attributes FillDeviceCapabilities(self.dev, self.desc)