Helmut Schellong — 3 Patents at Mannesmann Ag

Helmut Schellong has been granted 3 US patents while listed as an inventor at Mannesmann Ag. The first was granted in 1992 and the most recent in June 1998. Helmut Schellong ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Helmut Schellong in Duisburg, DE.

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
5765998	Process and apparatus for ensuring the operability of gas seals in turbocompressors	Wolfgang Zacharias	1998-06-16
5158431	Shaft seal assembly, especially for high-pressure turbocompressors	Karl-Heinz Victor, Hans-Wilhelm Laarmann, Gustav Maser, Ralf Dedeken	1992-10-27
5149249	Shaft seal assembly, especially for high-pressure turbocompressors	Karl-Heinz Victor, Hans-Wilhelm Laarman, Gustav Maser, Ralf Dedeken	1992-09-22

Helmut Schellong — 3 Patents

Issued Patents All Time

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