Stuart registered some 20 designs around 1921. Most that come up today are ring moulded tableware, also made in colour from the '30s.
I have just not kept records as to which number went with any particular design, so I can't help there.
You can register a complete design or any part of it, including shape, decoration, &c. Strictly speaking, a process could not be registered, only patented, but a process with a distinctive design outcome could, in effect, be protected by registering the outcome.
Distinctive glassworks-specific hand-blown pattern moulds are actually quite unusual for British production. Most, if not all of those used by Webb, for example, (Jackson lists: Cascade, Fircone, Old English Bull's Eye, Pineapple, Lattice, Mirror, MoirĂ©, Wave, Ribbonette, Corduroy, Spiral and Pea), could have been fairly standard items made to order by a specialist mouldmaker. These moulds, whether one-piece dip moulds or 3-section opening moulds, were precision machine tools, made to the highest standards, and designed to last indefinitely. And they were obviously expensive. They would have had to be used perhaps thousands of times to recoup the capital outlay.
The only other British glassworks registering such patterns known to me was John Walsh Walsh. See Miller's '20s & '30s, p.22, Rd. No. 458344 of 8th June 1905. I have an EPNS-mounted bride's basket in stock in the same Walsh tulip? pattern, but a totally different shape. Several of the Walsh pattern moulds were so protected, but they never carry a registration mark, probably for reasons relating to their successful marketing strategy to the USA.