When talking about the technique, Hajdamach does say “…patented a technique using threaded glass which must have been known to nineteenth century glassmakers…”. He doesn’t provide evidence for that though.
If there were articles like this jug around in the 19th century, it’s surprising that the manufacturing technique wouldn’t be widely known, and not patentable. It seems reasonably easy to work out how it was done when you can see the decoration progressing from a threaded spiral at the bottom to fully formed dots at the top, all on a ribbed body.
Wilkinson’s specification states “…The usual method of ornamenting glass articles with beads is to put each one on separately”, he goes on to describe his ‘new’ process with the threading.
Description of Wilkinson’s technique (my paraphrasing Hajdamach/Wilkinson from the other topic): The technique involved winding a coloured glass thread onto a vertically ribbed shape so that the thread only sticks to the peaks of the ribs. The shape is then spun and heated. Spinning stops the thread sticking to the shape in the troughs between ribs and heating breaks the thread where it hasn’t stuck, the broken threads melt back to a blob or spot where it adhered to the rib peaks. This gives an effect of vertical rows of uniformly spaced spots. It can then be blown and shaped as desired.