Growing community of inventors

Berlin, Germany

Christian Trenner

Average Co-Inventor Count = 1.71

ph-index = 1

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 1

Christian TrennerRoland Griese (2 patents)Christian TrennerHugo Girrbach (1 patent)Christian TrennerAndreas Fresenborg (1 patent)Christian TrennerChristian Trenner (4 patents)Roland GrieseRoland Griese (5 patents)Hugo GirrbachHugo Girrbach (1 patent)Andreas FresenborgAndreas Fresenborg (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Walter Hanke Mechanische Werkstatten Gmbh & Co. Kg (3 from 8 patents)

2. Walter Hanke Mechanishche Werkstätten Gmbh & Co. Kg (1 from 1 patent)


4 patents:

1. 8747194 - Device for singularising coins

2. 8534442 - Mechanical coin checking device having a confirmation photoelectric barrier which is secure against manipulation

3. 8381893 - Insertion device for coins

4. 7032735 - Coin slot for a mechanical coin-acceptor unit and mechanical coin-acceptor unit having a coin slot

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as of
12/15/2025
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