4. Illumination
  5. Automatic substitution of power supply or light source

Warren R. Alexander

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Automatic lamp bulb changer for signal lamps

Illumination – Automatic substitution of power supply or light source
Patent

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Automatic lamp bulb changer for signal lamps

Illumination – Automatic substitution of power supply or light source
Patent

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Electrical switch mechanism

Electricity: circuit makers and breakers – Special application – Change of inclination or of rate of motion responsive
Patent

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Spool valve for fluid control

Fluid handling – Systems – Programmer or timer
Reissue Patent

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Spool valve for fluid control

Fluid handling – Systems – Programmer or timer
Patent

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Profile ID: LFUS-PAI-P-582088

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