IPC Subgroup
F27D 21/02 Observation or illuminating devices
Introduced: September 1968
Last revised: January 2006
Full Title
Arrangement of monitoring devices; Arrangement of safety devices > Observation or illuminating devices
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- FURNACES; KILNS, OVENS OR RETORTS
- Subclass:
- DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
Related Keywords
INSPECTION apertures for furnaces