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1986-08-20
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1987-07-29
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1987-04-02
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1986-09-17
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1988-11-17
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1986-04-10
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1987-03-25
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1987-01-28
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1989-10-05
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1987-10-07
Method and apparatus for generating a set of signals representing a curve
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1986-10-15
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1989-08-31
Method and apparatus for generating seismic waves
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1982-06-26
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1986-07-22
Method and devices for making electro-acoustic transducer apparatus
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1988-07-13
Method and apparatus for the generation of dialing tones
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1988-06-09
Device and method for the demonstration of surface waves
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1987-10-07
Method and apparatus for generating a set of signals representing a curve
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1988-08-04
Method of generation of surface acoustic wave
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1992-06-26
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