I’m such an old-school designer: these pictures present some of my most essential tools for product (or artwork) development: pens, brushes, rulers, plaster wheel, hands on experimenting with material. Many thanks to co-operative Pinkka‘s ceramic studio and Katzstudio glassworks (both in Tampere, Finland) for being part of this early stage of prototyping. Pictures of the outcomes coming up later…
Ella Varvio 
Do you know any glass engravers from mid 1980’s with the initials LN?
Unfortunately no… Maybe you can ask a glass museum in your country if they have more info. Best regards : Ella