Glaverbel-Mecaniver S.a.

Emmanuel Lambert

Lucien Leger

Jean-Louis Lambert

Bernard De Longueville

A laminated glazing pane comprised of at least two sheets of vitreous material joined together by an intervening layer of plastic material given improved sound attenuation properties by constructing the pane in such a manner that its base frequency (f) is between 0.70 and 0.97 times its theoretical base frequency (f.sub.0).

Laminated glazing pane

In the severing of bodies of glass or vitrocrystalline materials by the application of a laser beam, the severing operation is improved by employing a beam of which at least the predominent wavelength is such that at least 10% of the beam energy penetrates the body to a depth of at least 0.2 mm.

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Brussels, Belgium

Emmanuel Lambert