Denstone Trademarks

DENSTONE
Dental Gypsum Used for Making Dental Casts
Cancelled  ·  June 24, 1982  ·  73371371  · 
DENSTONE
CERAMIC BALLS AND PELLETS USED AS CATALYST BED SUPPORTS
Registered  ·  September 9, 1974  ·  73031492  · 
denstone