LOCK-O-RING
Filed: October 4, 1956
FLANGES AND PLUGS FOR USE ON PIPELINES
Owned by: T. D. WILLIAMSON, INC.
Serial Number: 72016983
SHORTSTOPP
Filed: July 18, 1961
Apparatus for Plugging Pipelines and Other Fluid Conducting Conduits
Owned by: T. D. WILLIAMSON, INC.
Serial Number: 72124246
WEDGE-LOCK
Filed: July 20, 1964
PIPE PLUGS, AND THE LIKE
Owned by: T. D. WILLIAMSON, INC.
Serial Number: 72198246
STOPPLE
Filed: August 14, 1967
MACHINES FOR PREVENTING FLOW IN A CONDUIT BY INSERTING A PLUGGING ELEMENT THROUGH A LATERAL OPENING IN THE CONDUIT
Owned by: T. D. WILLIAMSON, INC.
Serial Number: 72278261
TDW
Filed: August 29, 1968
FLANGES, PIPE NIPPLES, PLUGS FOR USE ON PIPELINES AND OTHER FLOW CONDUITS; PLUGS FOR PLUGGING THE ENDS OF PIPELINES AND…
Owned by: T. D. WILLIAMSON, INC.
Serial Number: 72306290
PIG SIG
Filed: August 24, 1970
PASSAGE INDICATOR WHICH IS USED TO INDICATE THE PASSAGE OF A PIPELINE PIG PAST A SELECTED POINT IN A PIPELINE
Owned by: T. D. WILLIAMSON, INC.
Serial Number: 72368960
KALIPER
Filed: December 6, 1976
EQUIPMENT-NAMELY, A PIG ADAPTED TO BE TRANSMITTED THROUGH A PIPELINE OR OTHER FLOW CONDUIT TO SURVEY AND INSPECT THE INTERIOR…
Owned by: T. D. WILLIAMSON, INC.
Serial Number: 73108530
TDW
Filed: March 11, 1977
METAL VALVES, PIGS, PLUGS, GATES, FITTINGS, SLEEVES, TAMPONS, JOINTS, T'S, SEALS, FLANGES, NIPPLES, BUSHINGS, CASING SUPPORTING…
Owned by: T. D. WILLIAMSON, INC.
Serial Number: 73118663
