Per Billgren

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Soderfors, SE

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Patents Grantslast 30 patents

Information Patent Grant
Blank for gun barrel, method for producing said gun barrel and gun...
- Patent number 6,564,689
- Issue date May 20, 2003
- Damasteel Aktiebolag
- Per Billgren
- C21 - METALLURGY OF IRON
Information Patent Grant
Method relating to the manufacturing of a composite metal product
- Patent number 5,815,790
- Issue date Sep 29, 1998
- Soderfors Powder Aktiebolag
- Per Billgren
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Method relating to powder metallurgical manufacturing of a body
- Patent number 5,540,882
- Issue date Jul 30, 1996
- Erasteel Kloster Aktiebolag
- Per Billgren
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Tool die blank and manufacturing method thereof
- Patent number 4,748,088
- Issue date May 31, 1988
- Kloster Speedsteel Aktiebolag
- Per Billgren
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method of separating a solid and a liquid phase of a mass
- Patent number 4,265,700
- Issue date May 5, 1981
- Uddeholms Aktiebolag AB
- Per A. Billgren
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...