4. Geometrical instruments
  5. Straight-line light ray type

Dawei Dong

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Automatic laser detecting surveyor's rod

Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate

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Automatic laser level

Optics: measuring and testing – Fiducial instruments
Patent

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Automatic laser level

Optics: measuring and testing – Fiducial instruments
Patent

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Automatic laser plumb line

Geometrical instruments – Straight-line light ray type
Patent

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Automatic tracking mobile platform

Electricity: motive power systems – Positional servo systems – Vehicular guidance systems with single axis control
Patent

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Profile ID: LFUS-PAI-P-1240451

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