Static structures (e.g. – buildings) – Frangible section or means
Patent
1980-08-11
1983-03-22
Murtagh, John E.
Static structures (e.g., buildings)
Frangible section or means
52221, 52311, 52484, 83 53, 98 40D, E04B 100
Patent
active
043770592
ABSTRACT:
A suspended ceiling system comprising a plurality of inverted-T runners. Kerfed edge ceiling tile supported by runners and concealing the bottom of the runners. At least one ceiling tile having a central portion removable therefrom by being separable along a substantially vertical fine cut made by high pressure fluid jet cutting.
REFERENCES:
patent: 2410413 (1946-11-01), Hurley
patent: 2413568 (1946-12-01), Hurley
patent: 2830330 (1958-04-01), Heath
patent: 3121259 (1964-02-01), Versen
patent: 3977933 (1976-08-01), Sadashige
patent: 4048885 (1977-09-01), Miyakita
Adams Jerome J.
Kurlandsky S.
Murtagh John E.
Robinson Robert H.
United States Gypsum Company
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