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Machine tool dial assembly

Signals and indicators – Alarms – Fluid flow
Patent

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Magnetically operated door chime

Signals and indicators – Alarms – Burglar
Patent

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Magnetically operated warning device

Signals and indicators – Alarms – Burglar
Patent

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Maintenance alarm actuator

Signals and indicators – Alarms – Fluid-pressure variation
Patent

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Manual release and test apparatus for alarm system

Signals and indicators – Alarms – Thermal
Patent

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Maximum temperature-indicator

Signals and indicators – Alarms – Fluid flow
Patent

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Measuring instrument indicating mechanism

Signals and indicators – Alarms – Fluid flow
Patent

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Mechanical door chime powered by motion of the door

Signals and indicators – Alarms – Closure operated
Patent

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Mechanical motion sensor

Signals and indicators – Alarms – Fluid flow
Patent

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Mechanical warning device

Signals and indicators – Alarms – Liquid level
Reexamination Certificate

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Moisture gauge for a hanging potted plant

Signals and indicators – Alarms – Fluid flow
Patent

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Mounting for audible signal valve knob

Signals and indicators – Alarms – Fluid-pressure variation
Patent

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Movement indicator

Signals and indicators – Alarms – Fluid flow
Patent

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Multi-depth acoustic signal generating device

Signals and indicators – Alarms – Fluid-pressure variation
Patent

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Musical tea kettle

Signals and indicators – Alarms – Reeled material end
Patent

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