DIFF Subgroup Additional Only
H01J 2209/261 Apparatus used for sealing vessels, e.g. furnaces, machines or the like
Full Title
Apparatus and processes for manufacture of discharge tubes > Sealing parts of the vessel to provide a vacuum enclosure > Apparatus used for sealing vessels, e.g. furnaces, machines or the like
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Note: 1 CPC extensions are marked as secondary classification only.