4. Geometrical instruments
  5. Straight-line light ray type
  6. Rod or target

Charles E. Black

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Flexible surveyor's marker

Geometrical instruments – Straight-line light ray type – Rod or target
Patent

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Slide action electrical switches

Electricity: circuit makers and breakers – Multiple circuit control – Reciprocating contact
Patent

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Storm water detention filter system

Hydraulic and earth engineering – Bank – shore – or bed protection
Reexamination Certificate

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Profile ID: LFUS-PAI-P-966322

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