4. Elongated-member-driving apparatus
  5. Explosive-type driving means

Rowland J. Kopf

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Fastener driving tool

Tool driving or impacting – Impacting devices – Impact transmitting anvil
Patent

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Fastener driving tool

Elongated-member-driving apparatus – Explosive-type driving means
Patent

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Hardness testing probe assembly

Measuring and testing – Hardness – By penetrator or indentor
Patent

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Method and apparatus for testing hardness of homogeneous materia

Measuring and testing – Hardness – By penetrator or indentor
Patent

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