4. Combustion
  5. Timer, programmer, retarder or condition responsive control
  6. Control of purger, of scavenger or of combustion start-up...

Robert A. Black

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Apparatus and method for sensing rotation based on multiple...

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

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Condition control system with safety feedback means

Combustion – Timer – programmer – retarder or condition responsive control – Control of purger – of scavenger or of combustion start-up...
Patent

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Profile ID: LFUS-PAI-P-1372649

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