Grating

Details Grating Grating

1978-03-13

1981-03-03

Word, A. Hugo

Building units and construction elements

Structure

Simulative

D25 74, D2502

Patent

active

D02584654

REFERENCES:
patent: D205890 (1966-10-01), Pink
patent: D208531 (1967-09-01), Douglass
patent: D224703 (1972-09-01), Kiner
patent: 2278554 (1942-04-01), Morton
patent: 3093216 (1963-06-01), Dunham
patent: 3127961 (1964-04-01), Frazier
patent: 3181440 (1965-05-01), Mullaney et al.
patent: 3220681 (1965-11-01), Erbert
patent: 3565210 (1971-02-01), Evans
patent: 4137682 (1979-02-01), Trumper
Harrington & King Perforating Co., General Catalog No. 85, C. 1967, p. 144, top panel.

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