HE

Helmut Engelke

IBM: 8 patents #13,150 of 70,183Top 20%
Overall (All Time): #670,402 of 4,157,543Top 20%
8
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5166888 Fabrication of particle beam masks 1992-11-24
4591540 Method of transferring a pattern into a radiation-sensitive layer Harald Bohlen, Erwin Bretscher, Peter Nehmiz, Peter Vettiger, Johann Greschner 1986-05-27
4513203 Mask and system for mutually aligning objects in ray exposure systems Harald Bohlen, Johann Greschner, Reinhold Muhl, Peter Nehmiz, Hans-Joachim Trumpp 1985-04-23
4504558 Method of compensating the proximity effect in electron beam projection systems Harald Bohlen, Johann Greschner, Peter Nehmiz 1985-03-12
4426584 Method of compensating the proximity effect in electron beam projection systems Harald Bohlen, Johann Greschner, Peter Nehmiz 1984-01-17
4417946 Method of making mask for structuring surface areas Harald Bohlen, Johann Greschner, Peter Nehmiz 1983-11-29
4342817 Mask for structuring surface areas, and method of making it Harald Bohlen, Johann Greschner, Peter Nehmiz 1982-08-03
4334156 Method of shadow printing exposure Harald Bohlen, Werner Kulcke, Peter Nehmiz, Johann Greschner 1982-06-08