For the Inventor, By the Inventor

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Cologne, Germany

Oerlikon Leybold Vaccum Gmbh

USPTO Granted Patents = 2

Forward Citations = 0

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7 inventors (with patents filed for the assignee):

Peter Birch (2 out of 5 patents)

Robert Jenkins (2 out of 4 patents)

Thomas Dreifert (1 out of 14 patents)

4. Wolfgang Giebmanns (1 out of 6 patents)

5. Clive Tunna (1 out of 2 patents)

6. Roland Müller (1 out of 5 patents)

7. Magnus Janicki (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 9476423 - Roots pump connection channels separating adjacent pump stages (2016-10-25),

2. 8602759 - Screw-type vacuum pump having overpressure openings (2013-12-10),

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USPTO Data Jan 1 1976 - Dec 30 2025

2 Patents

#112 in Cologne

#10,508 in Germany

Cologne, Germany

Oerlikon Leybold Vaccum Gmbh

Forward Citations = 0

7 inventors:

Peter Birch (2 out of 5 patents)

Robert Jenkins (2 out of 4 patents)

Thomas Dreifert (1 out of 14 patents)

4. Wolfgang Giebmanns (1 out of 6 patents)

5. Clive Tunna (1 out of 2 patents)

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