Could you please cite the source of this information. My book shows a different mark for this company.Robineau Pottery - Syracuse, NY - 1901-1928
I think you may be seeing it wrong. Scroll down to it and you'll see what I mean. http://artsandcraftscollector.com/shopmarks/pottery_tilesKovel's Dictionary of Marks
Pottery & Porcelain
1986
Page 201