Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Fabric or lattice; e.g. – indeterminate grating
Patent
1987-03-13
1989-06-27
Safavi, Michael
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Fabric or lattice; e.g., indeterminate grating
52488, 52777, 52780, E04B 552
Patent
active
048417092
ABSTRACT:
A suspended ceiling constructed of wood having main beams and cross beams arranged to receive and support ceiling tiles. Each beam having horizontally projecting side extensions with the ends of the cross beams being grooved to frictionally fit on the side extensions of the main beam.
REFERENCES:
patent: 3003055 (1961-10-01), Liberman
patent: 3241280 (1966-03-01), Kreuger
patent: 3385020 (1968-05-01), Olson
patent: 3470666 (1969-10-01), Mod et al.
patent: 4281498 (1981-08-01), Kern
patent: 4367616 (1983-01-01), Pearson
patent: 4406104 (1983-09-01), Beck et al.
patent: 4454700 (1984-06-01), Kern
patent: 4525971 (1985-07-01), Kern
Peterson Marvin
Petroske Richard
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