DEMCO
Filed: October 18, 1965
OIL FIELD AND AIR CONDITIONING APPARATUS AND THE LIKE, NAMELY-DRILLPIPE FLOAT VALVES AND PULLERS, SAFETY RELIEF VALVES,…
Owned by: DEMCO, INCORPORATED
Serial Number: 72230366
DEMCO
Filed: October 18, 1965
OIL FIELD AND AIR CONDITIONING APPARATUS AND THE LIKE, NAMELY-DRILLPIPE FLOAT VALVES AND PULLERS, SAFETY RELIEF VALVES,…
Owned by: DEMCO, INCORPORATED
Serial Number: 72230367
DEMCO'S GREENLINE
Filed: May 22, 1967
NEWSLETTER PUBLISHED PERIODICALLY
Owned by: DEMCO, INCORPORATED
Serial Number: 72272028
DEMCO
Filed: November 1, 1971
WASTE TREATMENT SYSTEMS-NAMELY, APPARATUS FOR A MODIFIED ACTIVATED SLUDGE/EXTENDED AERATION PROCESS UTILIZING THE CONCEPT…
Owned by: DEMCO, INCORPORATED
Serial Number: 72406488
DEMCO
Filed: April 6, 1976
BALL VALVES AND PARTS THEREFOR
Owned by: DEMCO, INCORPORATED
Serial Number: 73082940
