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USPTO Patent Rankings Data through Sept 30, 2025
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Volker Mattern — 2 Patents

IBM: 2 patents #32,839 of 70,183Top 50%
Eppelheim, DE: #259 of 568 inventorsTop 50%
Overall (All Time): #2,293,069 of 4,157,543Top 60%
2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5304278 Apparatus for plasma or reactive ion etching and method of etching substrates having a low thermal conductivity Johann W. Bartha, Thomas Bayer, Johann Greschner, Dieter Kern, Roland Stoehr 1994-04-19
5296091 Method of etching substrates having a low thermal conductivity Johann W. Bartha, Thomas Bayer, Johann Greschner, Dieter Kern, Roland Stoehr 1994-03-22