IPC Subgroup
H01K 1/32 provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
Introduced: September 1968
Last revised: January 2006
Full Title
Details > Envelopes; Vessels > provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC INCANDESCENT LAMPS