MICROTEL B.V., A CORP. OF THE NETHERLANDS

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1051 HG, NL

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Patents Grantslast 30 patents

Information Patent Grant
Electroacoustic transducer of the so-called "electret" type, and a...
- Patent number 4,910,840
- Issue date Mar 27, 1990
- Microtel, B.V.
- Adrianus J. Sprenkels
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electroacoustic transducer of the so-called "electret" type, and a...
- Patent number 4,908,805
- Issue date Mar 13, 1990
- Microtel B.V.
- Adrianus J. Sprenkels
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electret transducer and a method for manufacturing an assembly of b...
- Patent number 4,567,382
- Issue date Jan 28, 1986
- Microtel B.V.
- Aart Z. van Halteren
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electret transducers: acoustically transparent backplate of sintere...
- Patent number 4,160,881
- Issue date Jul 10, 1979
- Microtel B.V.
- Adrianus J. Smulders
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Moving armature transducer with reinforced and pivoted diaphragm
- Patent number 4,126,769
- Issue date Nov 21, 1978
- Microtel B.V.
- Harmen Broersma
- H04 - ELECTRIC COMMUNICATION TECHNIQUE