4. Tool driving or impacting
  5. Automatic control of power operated means
  6. Tool advance causing or controlling means

Ernst Wohlwend

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Hollow crown drill with end face cutting members

Cutting by use of rotating axially moving tool – Tool or tool with support – Having axial – core-receiving central portion
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Hollow drilling tool

Cutting by use of rotating axially moving tool – Tool having crystalline cutting edge
Patent

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Method of setting fastening elements in a hard receiving materia

Metal working – Method of mechanical manufacture – Assembling or joining
Patent

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Motorized hand tool for drilling

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent

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Profile ID: LFUS-PAI-P-1037028

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