Keller Mario patents

• Method for producing a green paper for producing a gas diffusion layer for a fuel cell

  US-2023411632-A1 · Dec 21, 2023 · US

• Composite glass with an intermediate film that changes colour depending on the viewing angle

  US-11745474-B2 · Sep 5, 2023 · US

• Mounting and fastening of individual elements on a substrate web

  US-2022059374-A1 · Feb 24, 2022 · US

• Application and fastening of a defined number of individual elements to a substrate web

  US-2022055853-A1 · Feb 24, 2022 · US

• Composite glass with an intermediate film that changes colour depending on the viewing angle

  US-2021339504-A1 · Nov 4, 2021 · US

• Application device

  US-10486455-B2 · Nov 26, 2019 · US

• Application device

  US-2018141370-A1 · May 24, 2018 · US

• Filter element, device for folding a filter medium web and process for producing a zigzag-folded filter element

  US-9486719-B2 · Nov 8, 2016 · US

• Security element

  US-9399366-B2 · Jul 26, 2016 · US

• Filter Medium, Particularly an Air Filter Medium and Filter Element, Particularly an Air Filter Element, Having a Filter Medium

  US-2016051918-A1 · Feb 25, 2016 · US

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