Card – picture – or sign exhibiting – Signs – Sign support
Patent
1998-06-19
1999-10-12
Friedman, Carl D.
Card, picture, or sign exhibiting
Signs
Sign support
40612, 40606, 404 6, 404 9, 116 63D, G09F 1922
Patent
active
059640537
ABSTRACT:
An improved structure of warning sign comprised of two warning plates, two pivot axles and several light reflexible sheets, wherein, the inner sides of two lateral edges on the top end of each warning plate each has a recess, a bevelled edge is provided above each recess, and two lateral engaging plates are provided under the two recesses of each warning plate, one of the lateral engaging plates of each warning plate has inside thereof a protruding engaging spot, and the other lateral engaging plate of the warning plate has inside thereof several arciform dents, each warning plate has on the inner side thereof two engaging plates with a wider spacing and two engaging plates with a narrower sparing, all the engaging plates each has a pivot hole, a square hole is provided between the engaging plates with wider spacings and the engaging plates with narrower spacings.
REFERENCES:
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patent: 3917232 (1975-11-01), Lindner
patent: 4298186 (1981-11-01), Glass
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patent: 4796369 (1989-01-01), Hamann
patent: 5046885 (1991-09-01), Thurston
patent: 5382112 (1995-01-01), Fu
patent: 5544614 (1996-08-01), Cushman
patent: 5621992 (1997-04-01), Mandell et al.
A Phi Dieu Tran
Friedman Carl D.
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