4. Acoustics
  5. Sound-modifying means
  6. Sound absorbing panels

John K. Fletcher

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Acoustical insulating barrier and method of making the barrier

Acoustics – Sound-modifying means – Sound absorbing panels
Patent

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Acoustical insulating barrier and method of making the barrier

Acoustics – Sound-modifying means – Sound absorbing panels
Reexamination Certificate

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Detachable sling letdown apparatus for lumber sorter

Classifying – separating – and assorting solids – Adhesion – Coated surface or mass
Patent

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Profile ID: LFUS-PAI-P-1334248

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