I've looked through both volumes of Dansk Glas, and Kastrup & Holmegaard's Glassworks: 1825-1975 (which has some refreence to other Danish glassworks), but no mention of any company called Jylland Glas in either.
However, there's a small paragraph in Glashandvaerk i Danmark that says glass production in North Jutland ended in 1922 After the Aalborg factory was purchased by Kastrup Glasvaerk and closed down.
So, in essence... I've not got a clue. Sorry.