IPC Subgroup
H04N 5/72 Modifying the appearance of television pictures by optical filters or diffusing screens
Introduced: September 1968
Last revised: January 2006
Full Title
Details of television systems > Modifying the appearance of television pictures by optical filters or diffusing screens
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- PICTORIAL COMMUNICATION, e.g. TELEVISION