GEBRUDER HEYL ANALYSENTECHNIK GMBH & CO. KG Trademarks
TESTOMAT
Filed: January 10, 1966
LIQUID REAGENTS FOR THE TESTING OF WATER HARDNESS
Owned by: GEBRUDER HEYL ANALYSENTECHNIK GMBH & CO. KG
Serial Number: 72236034
DUROVAL
Filed: August 13, 1969
CHEMICAL REAGENTS FOR DETERMINING TOTAL HARDNESS IN WATER
Owned by: GEBRUDER HEYL ANALYSENTECHNIK GMBH & CO. KG
Serial Number: 72335221
