Signup
Login
Convectron Trademarks
CONVECTRON
vacuum gauges, namely gauge tubes and vacuum gauge controllers used in the measurement of vacuums
Registered
·
August 9, 1994
·
74558972
·
CONVECTRON
PORTABLE ELECTRIC BASEBOARD HEATERS
Cancelled
·
January 31, 1984
·
73463509
·
CONVECTRON
TUBES ENCLOSING HEATER ELEMENTS SURROUNDED BY A FLUID MEDIUM, IN WHICH VARIATIONS IN THE CONVECTION CURRENTS IN THE FLUID MEDIUM CHANGES THE OHMIC VALUE OF THE ELEMENTS
Expired
·
April 1, 1947
·
71519918
·
Previous
1
Next