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

Philip Schaefer

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Computer interface for navigating graphical user interface...

Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate

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Method and apparatus for a rotation angle sensor

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

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Profile ID: LFUS-PAI-P-2044890

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