4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Photocell controls its own optical systems

Joseph A. Powell

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Positioner and slitter for laminar material

Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent

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Spring actuated cam retractor

Advancing material of indeterminate length – By intermittent material-mover – Stored material-movement-derived energy provides moving force
Patent

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Tire

Transportation – Parts – accessories and attachments for vehicles not... – Exterior or interior trim
Patent

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Profile ID: LFUS-PAI-P-1918254

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