4. Communications, electrical: acoustic wave systems and devices
  5. Seismic prospecting
  6. Land-reflection type

Erkki Jalkanen

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Sensor device for the 3-dimensional measurement of an...

Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element
Reexamination Certificate

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Sound source arrangement

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent

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Profile ID: LFUS-PAI-P-592044

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