Kent Hultberg

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B.ang.stad, SE

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Patents Grantslast 30 patents

Information Patent Grant
Double-walled structure in a ventilation duct system
- Patent number 6,062,270
- Issue date May 16, 2000
- Lindab AB
- Kent Hultberg
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Method for producing a double-walled structure
- Patent number 5,911,457
- Issue date Jun 15, 1999
- Lindab AB
- Kent Hultberg
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Apparatus for making a double-walled structure
- Patent number 5,881,442
- Issue date Mar 16, 1999
- Lindab AB
- Kent Hultberg
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Double-walled structure and method and arrangement for producing th...
- Patent number 5,801,342
- Issue date Sep 1, 1998
- Lindab AB
- Kent Hultberg
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...