4. Geometrical instruments
  5. Indicator of direction of force traversing natural media
  6. Level or plumb, terrestrial gravitation responsive

Ching-Horng Hsiao

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Laser receiver

Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate

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Non-contact electronic level

Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Reexamination Certificate

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Non-contact electronic level

Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Reexamination Certificate

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Three way laser indicator

Geometrical instruments – Straight-line light ray type – Alignment device
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2401452

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