James H. Backus - Alexandria VA Charles E. Cornwell - Alexandria VA
International Classification:
B28C 546
US Classification:
259148
Abstract:
This invention consists of a mixing method for dustless dry cementitious compositions and apparatus for combining materials without loss or escape of dust.
Samuel B. Huey Elementary School Philadelphia PA 1989-1992, William B. Mann Elementary School Philadelphia PA 1989-1994, General Louis Wagner Junior High School Philadelphia PA 1995-1998, Delaware Valley Charter High School Philadelphia PA 2000-2001
Algonquin Composite School North Bay Morocco 1954-1958, King George Public School North Bay Morocco 1954-1959, Hamilton Collegiate Institute Hamilton Morocco 1963-1969, Delta Collegiate Institute Hamilton Morocco 1964-1970