4. Metal deforming
  5. By use of non-deforming work-gripping clamp and relatively...
  6. Clamp structure constitutes sole initial metal-deforming...

Leonard F. Postema

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Aerator

Earth working – Lawn aerator or perforator – or plug remover – Earth removing
Patent

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Aerator

Earth working – Lawn aerator or perforator – or plug remover
Patent

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Aerator

Earth working – With drive means for tool or cleaner – Tool driven about axis transverse to draft line
Patent

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Aerator wheel

Earth working – Lawn aerator or perforator – or plug remover
Patent

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Method and apparatus for fabricating arcuate wooden structures

Woodworking – Process – Securing
Patent

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Profile ID: LFUS-PAI-P-435232

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