Knockdown Patents (Class 211/189)
- Including central support (e.g., tree-like, etc.) (Class 211/196)
- Similar planar frames pivotally joined at adjacent edges (e.g., A-frame, etc.) (Class 211/198)
- Similar planar frames pivotally joined inwardly of their edges (e.g, crossed frames, etc.) (Class 211/200)
- Frames movable toward each other in parallel relationship (Class 211/201)
- Lazy-tong construction (Class 211/202)
- Including multiple legs pivotally joined at a single zone (e.g., tripod, etc.) (Class 211/203)
- Horizontal rod supported by one or more uprights (e.g., hanger rod, etc.) (Class 211/204)