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Camiel Eugène Groffen
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Hoofddorp, NL
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Patents Grants
last 30 patents
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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
Information
Patent Grant
Magnet assembly
Patent number
10,699,833
Issue date
Jun 30, 2020
Sonion Nederland B.V.
Camiel Eugène Groffen
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Assembly comprising an electrostatic sound generator and a transformer
Patent number
10,687,148
Issue date
Jun 16, 2020
Sonion Nederland B.V.
Rasmus Voss
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 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
Information
Patent Application
Magnet Assembly
Publication number
20180182524
Publication date
Jun 28, 2018
Sonion Nederland BV
Camiel Eugène Groffen
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
ASSEMBLY COMPRISING AN ELECTROSTATIC SOUND GENERATOR AND A TRANSFORMER
Publication number
20170223464
Publication date
Aug 3, 2017
Sonion Nederland BV
Rasmus Voss
H04 - ELECTRIC COMMUNICATION TECHNIQUE