4. Electricity: measuring and testing
  5. Magnetic
  6. Displacement

Scott L. Spence

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Differential pressure control apparatus

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent

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Differential pressure transducer

Lubrication – Safety alarm or indicating means
Patent

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Differential pressure transmitter

Measuring and testing – Fluid pressure gauge – Diaphragm
Patent

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Elastomer type low pressure sensor

Measuring and testing – Fluid pressure gauge – Diaphragm
Patent

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Furnace draft control with remote control feature

Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent

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Profile ID: LFUS-PAI-P-93503

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