Duisburg
Germany
9
2017-08-03
The entities that hold a legal rights for patent applications filed by inventor Kümmerling Rolf:
Rolf Kümmerling from Duisburg, DE has applied for patents for these inventions. The list has both pending applications and granted patents:
Method for producing hot-rolled seamless pipes having thickened ends
#2 | 2016-12-01Piercing mandrel having an improved service life for producing seamless tubes
#3 | 2016-11-10Rolling rod as an inner tool in the production of seamless metal hollow bodies and method for producing a metal hollow body
#4 | 2013-12-19Method for producing seamless hot-rolled pipes in continuous pipe rolling mills
#5 | 2012-11-01Method and device for the optimized circulation of rods in the production of a seamlessly hot-fabricated steel pipe according to the continuous pipe method
#6 | 2012-05-24Method for producing seamless tubes by means of a three-roll bar rolling mill
#7 | 2010-10-07FORGING MANDREL FOR HOT-FORGING TUBULAR WORKPIECES OF METAL
#8 | 2009-05-07Method of making a seamless hollow body from steel
#9 | 2009-02-19Method of making a seamless hot-finished steel pipe, and device for carrying out the method
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