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| Number | Title | Issue Date |
| 4923322 | Clamped framework assembly and connectors used therewith A structural framework assembly made up of tubular members interconnected by a first connector arrangement which uses a connector having a concave surface pressing against a curved outer surface of a tubular member and having a pair of spreadable arms whi... | 05/08/1990 |
| 4864795 | Structural framework system and clamp assembly A structural framework assembly (150) is made up of framework subassemblies (102, 104, 104', etc.) interconnected by elongated horizontal structural members (122, 124, 126, 128, etc.). The subassemblies are made up of elongated structural members (114, 11... | 09/12/1989 |
