4. Environmental heating and cooling; fluid handling and sanitary e
  5. Fluid handling or treatment equipment
  6. Dispersal

Holdren Brothers, Inc.

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Silo dig out tool

Material or article handling – Static receptacle and means for charging or discharging – or... – Nongravity discharging means
Patent

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Tank cleaning spray head

Environmental heating and cooling; fluid handling and sanitary e – Fluid handling or treatment equipment – Dispersal
Patent

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Twist pin

Pipe joints or couplings – Essential catch
Reexamination Certificate

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