The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 2008
Filed:
Apr. 02, 2005
Tom Harald Birkeland, Auli, NO;
Inge Vintermyr, Oslo, NO;
Tom Eirik Toften, Fauske, NO;
Per Arne Osborg, Askar, NO;
Vegard B Larsen, Oslo, NO;
Tom Harald Birkeland, Auli, NO;
Inge Vintermyr, Oslo, NO;
Tom Eirik Toften, Fauske, NO;
Per Arne Osborg, Askar, NO;
Vegard B Larsen, Oslo, NO;
NEXANS, , FR;
Abstract
An optical cable unit has a metal tube with a longitudinal laser-welded seam and at least one optical waveguide in the interior of the metal tube. The metal tube has a first inner layer and a second outer layer, where the first inner layer is made from copper and the second outer layer is made from austenitic steel. The longitudinal seam of both layers is laser welded and the seams of the layers are in superimposed alignment, where the laser welding is performed by a COlaser.