C Y Tech
Washington DC 20599
Chemalloy Co Inc
Bryn Mawr PA 19010
Dicaperl Minerals Corp.
Crawfordsville IN 47939
Edw. C. Levy Co.
Delta OH 43515
Elextro-tech Machining
Long Beach CA 90813
General Electric Betz
East Chicago IN 46312
American Art And Clay Co.
Indianapolis IN 46298
Beelman Slag Sales
Madison IL 62060
Hill And Griffith Co
Cincinnati OH 45999
I K G Fiberglass Systems
Nashville TN 37250
Kentucky-Tennessee Clay Co.
Sandersville GA 31082
Krex Graphite
Northbrook IL 60062
Laguna Clay Co Inc
La Puente CA 91749
Three Forks MT 59752
Manley Brothers
Troy Grove IL 61372
Nelco of Texas
Houston TX 77299
Olympic Mill Services
Portage IN 46368
Paramount Perlite Co
Paramount CA 90723
Patents and TMS PC
Chicago IL 60701
Pbm Broach & Tool
Center Line MI 48015
Penn Rillton Division
West Elizabeth PA 15088
Potters Industries
Chattanooga TN 37450
R J Marshall Co Inc
Southfield MI 48086
Sober Brothers Inc
Ponca City OK 74604
Solico Co
Albuquerque NM 87199
Solite Holding
Richmond VA 23298
Spruce Pine Mica Co Inc
Spruce Pine NC 28777
The R J Marshall Company
Southfield MI 48086
Thiele Kaolin Of Wisconsin
Wisconsin Rapids WI 54495
Tube City
Petersburg VA 23803
Unimin Corp.
Mc Intyre GA 31054
Verlite Company
Tampa FL 33694
Yellowstone Mines
Cameron MT 59720