4. Metal working
  5. Method of mechanical manufacture
  6. Gas and water specific plumbing component making

Jeffrey A. Hermanson

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Circular and oval flanged rings for connecting ducting and...

Metal working – Method of mechanical manufacture – Gas and water specific plumbing component making
Reexamination Certificate

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Circular and oval flanged rings for ducting and method of...

Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
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Flanged connector for HVAC ducting

Pipe joints or couplings – Flange
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2124513

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