Harmen Broersma

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Amsterdam-N., NL

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Patents Grantslast 30 patents

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
Information Patent Grant
Transducer and method of making same
- Patent number 4,002,863
- Issue date Jan 11, 1977
- Harmen Broersma
- H04 - ELECTRIC COMMUNICATION TECHNIQUE