Hello dculvyho , welcome to the Board. Now I don't collect vases, just animals and birds and I love anything with btterflies on, so your title caught my eye.
I understand there is a company called 'Ingrid Glass' but I am not certain if it is Czech or German. I think there is also a company called 'Ingrid Pears Glass'.
I don't think yours is the signature of the engraver, I think it is the maker of the vase.
There are lots of others here who will know more about this, so I will leave it to them now, but you have a couple of company names to be researching in the meantime.
Rosie.