4. Optics: measuring and testing
  5. Photometers
  6. Comparison

Robert Dale Zeller

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Free fall safety assembly for use with a luminaire raise-lower a

Supports – Stand and bracket – Having adjustable bracket
Patent

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Latching mechanism for high mast lighting system

Joints and connections – Interfitted members – Lugged member – rotary engagement
Reexamination Certificate

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Method of and assembly for measuring equivalent sphere illuminat

Optics: measuring and testing – Photometers – Comparison
Patent

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Profile ID: LFUS-PAI-P-247171

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