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US3209309A
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Electrical terminal board for interconnecting components
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US3041549A
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Temperature control systems
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US3041548A
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Temperature control systems
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US3158854A
|
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Electronic counter
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US2975261A
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Temperature control system
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US3065414A
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Automatic testing apparatus
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US2837650A
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Apparatus for generating stable frequencies
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US2790884A
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Miniature crystal oven
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US2920175A
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Constant temperature chamber, in particular a crystal oven
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US2751483A
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Constant temperature oven
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US2742387A
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Reflector for electromagnetic radiations and method of making same
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US2751560A
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High frequency capacitator
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