1
Erich Berger, Hans Langer: Process and apparatus for applying authenticating coding to value-carrying paper. Oesterreichische Nationalbank, Karl F Ross, Herbert Dubno, April 26, 1988: US04740269 (122 worldwide citation)

In the process according to our invention authenticating (code) marks are provided on paper, particularly a security or other financial instrument, by contacting laser radiation from a laser light source on the paper to form the authenticating marks. The objects of our invention are attained with an ...


2
Hans Langer, Miguel Cabrera: Method and apparatus for production of a three-dimensional object. EOS Electro Optical Systems, Donald Brown, October 24, 1995: US05460758 (90 worldwide citation)

A three-dimensional object is modelled by solidifying superposed layers in such a manner that on an already solidified layer a following layer of initially liquid or powdery material is solidified by light action or the like in correspondence with the form of the object.


3
Hans Langer, Christian Wilkening, Peter Keller, Florian Wendt: Method for use in casting technology. EOS Electro Optical Systems, George W Neuner, Dike Bronstein Roberts & Cushman, December 5, 2000: US06155331 (84 worldwide citation)

The geometry of the cast part is provided as a digital pattern and an inverse pattern for the lost casting mold including any core is generated from the digital pattern. A layer of a particulate molding material is provided. The molding material is made of a first material and a second material. The ...


4
Carl Fruth, Hans Langer: Method for producing a three-dimensional object. 3D Systems, Dennis R Smalley, Forrest L Collins, April 27, 1999: US05897825 (41 worldwide citation)

In a method for producing a three-dimensional object (6) wherein the object is produced by successive solidification of individual layers (6a, 6b, 6c, 6d, 64) of a liquid or powderous material (3) by action of electromagnetic radiation (8, 10) and a supporting structure (20, 21) for supporting the o ...


5
Hans Langer, Johannes Reichle: Method for producing a three-dimensional object. EOS Optical Systems, George W Neuner, Dike Bronstein Roberts & Cushman, August 3, 1999: US05932059 (35 worldwide citation)

In a method for producing a three-dimensional object wherein the object is generated by successive solidification of individual layers of the object from a liquid or powdery material by action of electromagnetic radiation, the problem arises that the object is either distorted due to shrinkage of th ...


6
Christian Wilkening, Jurgen Serbin, Hans Langer, Guido Hornig, Andreas Ronner: Method and apparatus for calibrating a control apparatus for deflecting a laser beam. EOS Electro Optical Systems, George W Neuner, November 3, 1998: US05832415 (31 worldwide citation)

In a method for calibrating the deflection control of a laser beam a light-sensitive medium (5) is exposed to a laser beam (2) at predetermined positions for generating a test pattern (20), thereafter digitized partial pictures of pattern portions (21) of the test pattern (20) are produced and the d ...


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