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Lift-positioning system |
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2001-09-11 |
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Capacitive gas flow sensor |
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1999-09-28 |
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Underwater pinger automatic deployment switch |
— |
1997-11-04 |
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Underwater pinger acoustic resonance chamber |
— |
1997-05-06 |
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Thermal storage control logic for storage heaters |
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1993-01-12 |
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Methods and apparatus for protecting metal structures |
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1988-07-05 |
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Solenoid driven metering pump supply voltage compensation circuit |
— |
1986-12-30 |