Grzegorz Kurpiel

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Hoofddorp, NL

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Patents Grantslast 30 patents

Information Patent Grant
Receiver assembly comprising an armature and a diaphragm
- Patent number 10,721,566
- Issue date Jul 21, 2020
- Sonion Nederland B.V.
- Mattijs Tjepkema
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Receiver with venting opening
- Patent number 10,708,685
- Issue date Jul 7, 2020
- Sonion Nederland B.V.
- Jan Hijman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
RECEIVER ASSEMBLY COMPRISING AN ARMATURE AND A DIAPHRAGM
- Publication number 20180367916
- Publication date Dec 20, 2018
- Sonion Nederland BV
- Mattijs Tjepkema
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Receiver With Venting Opening
- Publication number 20180343515
- Publication date Nov 29, 2018
- Sonion Nederland BV
- Jan Hijman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE