Fwd: Signature

Does anyone know who this artist might be?   
From: Randall/Andrea Knutson <randaknutson@gmail.com>
Date: Thu, Oct 31, 2019 at 5:53 AM
Subject: Signature

From: Andrea Knutson <randaknutson@gmail.com>
Subject: RGM blown glass

Hello! I have a hand blown piece with RGM on the bottom. The only thing I could find is that there may have been an RGM glass in Portland? Can you help? I can’t send a photo on this site but could if you email me. Thanks! Andrea