DUO SEAL
Filed: February 18, 1948
VACUUM PUMPS, PARTICULARLY PUMPS FOR THE CREATION OF HIGH VACUUM CONDITIONS IN LABORATORY EXPERIMENTAL AND TESTING OPERATIONS…
Owned by: WELCH VACUUM TECHNOLOGY, INC.
Serial Number: 71550105
DIRECTORR
Filed: September 27, 1971
VACUUM PUMPS
Owned by: WELCH VACUUM TECHNOLOGY, INC.
Serial Number: 72403713
TURBOTORR
Filed: May 9, 1974
VACUUM PUMPS OF THE TURBO MOLECULAR-TYPE AND PARTS THEREFOR
Owned by: WELCH VACUUM TECHNOLOGY, INC.
Serial Number: 73021008
CAPTURE
Filed: October 6, 1992
vacuum pumps equipped for recovery of refrigerant from air conditioners and chillers
Owned by: WELCH VACUUM TECHNOLOGY, INC.
Serial Number: 74320675
CHEMSTAR
Filed: May 4, 1994
vacuum pumps and parts therefor
Owned by: WELCH VACUUM TECHNOLOGY, INC.
Serial Number: 74522174
GELMASTER
Filed: May 3, 1996
vacuum systems consisting primarily of vacuum pumps, condensers, collector traps, and associated fittings, sold as a unit…
Owned by: WELCH VACUUM TECHNOLOGY, INC.
Serial Number: 75098237
