IPC Subgroup
E05D 11/04 relating to the use of free balls as bearing-surfaces
Introduced: September 1968
Last revised: January 2006
Full Title
Additional features or accessories of hinges > relating to the use of free balls as bearing-surfaces
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- Subclass:
- HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS