|
GB808233A
|
|
Improvements relating to furnaces for the heat treatment of metal articles
|
|
GB628290A
|
|
Improvements relating to oil burning devices
|
|
GB537489A
|
|
Improvements relating to furnaces
|
|
GB326636A
|
|
Improvements relating to furnaces for annealing glass and other articles
|
|
GB249919A
|
|
Improvements in apparatus for effecting the transfer of heat between gases
|
|
US1499706A
|
|
Crucible and like furnace
|
|
GB194819A
|
|
Improvements relating to crucible and like furnaces
|
|
GB183394A
|
|
Improvements relating to gas heated crucible furnaces
|
|
US1469461A
|
|
Furnace
|
