4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Optical or pre-photocell system

William Barrett

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Method and apparatus for laser beam drift compensation

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

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Method and device for teaching reading of a foreign language bas

Education and demonstration – Language – Foreign
Patent

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Method, apparatus, and system for bi-solvent based cleaning...

Cleaning and liquid contact with solids – Processes – Using sequentially applied treating agents
Reexamination Certificate

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Removable recreational vehicle sanitary drain connector

Fluid handling – With casing – support – protector or static constructional... – Vehicle
Patent

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Profile ID: LFUS-PAI-P-1775277

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