4. Optics: measuring and testing
  5. Lamp beam direction or pattern

John L. DeRosa

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Derosa router chuck

Chucks or sockets – Socket type – Side detent
Reexamination Certificate

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In-line, concurrent electromagnetic beam analyzer

Optics: measuring and testing – Lamp beam direction or pattern
Patent

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Quick change power tool chuck

Chucks or sockets – Socket type – One movable side
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1835556

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